/*
 * @name BeautyTips
 * @desc a tooltips/baloon-help plugin for jQuery
 *
 * @author Jeff Robbins - Lullabot - http://www.lullabot.com
 * @version 0.9.5 release candidate 1  (5/20/2009)
 */
 
jQuery.bt = {
    version: '0.9.5-rc1'
};
 
/*
 * @type jQuery
 * @cat Plugins/bt
 * @requires jQuery v1.2+ (not tested on versions prior to 1.2.6)
 *
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Encourage development. If you use BeautyTips for anything cool 
 * or on a site that people have heard of, please drop me a note.
 * - jeff ^at lullabot > com
 *
 * No guarantees, warranties, or promises of any kind
 *
 */

;
(function($) { 
    /**
   * @credit Inspired by Karl Swedberg's ClueTip
   *    (http://plugins.learningjquery.com/cluetip/), which in turn was inspired
   *    by Cody Lindley's jTip (http://www.codylindley.com)
   *
   * @fileoverview
   * Beauty Tips is a jQuery tooltips plugin which uses the canvas drawing element
   * in the HTML5 spec in order to dynamically draw tooltip "talk bubbles" around
   * the descriptive help text associated with an item. This is in many ways
   * similar to Google Maps which both provides similar talk-bubbles and uses the
   * canvas element to draw them.
   *
   * The canvas element is supported in modern versions of FireFox, Safari, and
   * Opera. However, Internet Explorer needs a separate library called ExplorerCanvas
   * included on the page in order to support canvas drawing functions. ExplorerCanvas
   * was created by Google for use with their web apps and you can find it here:
   * http://excanvas.sourceforge.net/
   *
   * Beauty Tips was written to be simple to use and pretty. All of its options
   * are documented at the bottom of this file and defaults can be overwritten
   * globally for the entire page, or individually on each call.
   *
   * By default each tooltip will be positioned on the side of the target element
   * which has the most free space. This is affected by the scroll position and
   * size of the current window, so each Beauty Tip is redrawn each time it is
   * displayed. It may appear above an element at the bottom of the page, but when
   * the page is scrolled down (and the element is at the top of the page) it will
   * then appear below it. Additionally, positions can be forced or a preferred
   * order can be defined. See examples below.
   *
   * To fix z-index problems in IE6, include the bgiframe plugin on your page
   * http://plugins.jquery.com/project/bgiframe - BeautyTips will automatically
   * recognize it and use it.
   *
   * BeautyTips also works with the hoverIntent plugin
   * http://cherne.net/brian/resources/jquery.hoverIntent.html
   * see hoverIntent example below for usage
   *
   * Usage
   * The function can be called in a number of ways.
   * $(selector).bt();
   * $(selector).bt('Content text');
   * $(selector).bt('Content text', {option1: value, option2: value});
   * $(selector).bt({option1: value, option2: value});
   *
   * For more/better documentation and lots of examples, visit the demo page included with the distribution
   *
   */ 
  
    jQuery.fn.bt = function(content, options) {
  
        if (typeof content != 'string') {
            var contentSelect = true;
            options = content;
            content = false;
        }
        else {
            var contentSelect = false;
        }
    
        // if hoverIntent is installed, use that as default instead of hover
        if (jQuery.fn.hoverIntent && jQuery.bt.defaults.trigger == 'hover') {
            jQuery.bt.defaults.trigger = 'hoverIntent';
        }
  
        return this.each(function(index) {
  
            var opts = jQuery.extend(false, jQuery.bt.defaults, jQuery.bt.options, options);
  
            // clean up the options
            opts.spikeLength = numb(opts.spikeLength);
            opts.spikeGirth = numb(opts.spikeGirth);
            opts.overlap = numb(opts.overlap);
      
            var ajaxTimeout = false;
      
            /**
       * This is sort of the "starting spot" for the this.each()
       * These are the init functions to handle the .bt() call
       */
  
            if (opts.killTitle) {
                $(this).find('[title]').andSelf().each(function() {
                    if (!$(this).attr('bt-xTitle')) {
                        $(this).attr('bt-xTitle', $(this).attr('title')).attr('title', '');
                    }
                });
            }
      
            if (typeof opts.trigger == 'string') {
                opts.trigger = [opts.trigger];
            }
            if (opts.trigger[0] == 'hoverIntent') {
                var hoverOpts = jQuery.extend(opts.hoverIntentOpts, {
                    over: function() {
                        this.btOn();
                    },
                    out: function() {
                        this.btOff();
                    }
                });
            $(this).hoverIntent(hoverOpts);
      
        }
        else if (opts.trigger[0] == 'hover') {
            $(this).hover(
                function() {
                    this.btOn();
                },
                function() {
                    this.btOff();
                }
                );
        }
        else if (opts.trigger[0] == 'now') {
            // toggle the on/off right now
            // note that 'none' gives more control (see below)
            if ($(this).hasClass('bt-active')) {
                this.btOff();
            }
            else {
                this.btOn();
            }
        }
        else if (opts.trigger[0] == 'none') {
            // initialize the tip with no event trigger
            // use javascript to turn on/off tip as follows:
            // $('#selector').btOn();
            // $('#selector').btOff();
            }
            else if (opts.trigger.length > 1 && opts.trigger[0] != opts.trigger[1]) {
                $(this)
                .bind(opts.trigger[0], function() {
                    this.btOn();
                })
                .bind(opts.trigger[1], function() {
                    this.btOff();
                });
            }
            else {
                // toggle using the same event
                $(this).bind(opts.trigger[0], function() {
                    if ($(this).hasClass('bt-active')) {
                        this.btOff();
                    }
                    else {
                        this.btOn();
                    }
                });
            }
      
      
            /**
       *  The BIG TURN ON
       *  Any element that has been initiated
       */
            this.btOn = function () {
                if (typeof $(this).data('bt-box') == 'object') {
                    // if there's already a popup, remove it before creating a new one.
                    this.btOff();
                }
  
                // trigger preBuild function
                // preBuild has no argument since the box hasn't been built yet
                opts.preBuild.apply(this);
        
                // turn off other tips
                $(jQuery.bt.vars.closeWhenOpenStack).btOff();
        
                // add the class to the target element (for hilighting, for example)
                // bt-active is always applied to all, but activeClass can apply another
                $(this).addClass('bt-active ' + opts.activeClass);
  
                if (contentSelect && opts.ajaxPath == null) {
                    // bizarre, I know
                    if (opts.killTitle) {
                        // if we've killed the title attribute, it's been stored in 'bt-xTitle' so get it..
                        $(this).attr('title', $(this).attr('bt-xTitle'));
                    }
                    // then evaluate the selector... title is now in place
                    content = $.isFunction(opts.contentSelector) ? opts.contentSelector.apply(this) : eval(opts.contentSelector);
                    if (opts.killTitle) {
                        // now remove the title again, so we don't get double tips
                        $(this).attr('title', '');
                    }
                }
        
                // ----------------------------------------------
                // All the Ajax(ish) stuff is in this next bit...
                // ----------------------------------------------
                if (opts.ajaxPath != null && content == false) {
                    if (typeof opts.ajaxPath == 'object') {
                        var url = eval(opts.ajaxPath[0]);
                        url += opts.ajaxPath[1] ? ' ' + opts.ajaxPath[1] : '';
                    }
                    else {
                        var url = opts.ajaxPath;
                    }
                    var off = url.indexOf(" ");
                    if ( off >= 0 ) {
                        var selector = url.slice(off, url.length);
                        url = url.slice(0, off);
                    }
        
                    // load any data cached for the given ajax path
                    var cacheData = opts.ajaxCache ? $(document.body).data('btCache-' + url.replace(/\./g, '')) : null;
                    if (typeof cacheData == 'string') {
                        content = selector ? $("<div/>").append(cacheData.replace(/<script(.|\s)*?\/script>/g, "")).find(selector) : cacheData;
                    }
                    else {
                        var target = this;
                      
                        // set up the options
                        var ajaxOpts = jQuery.extend(false,
                        {
                            type: opts.ajaxType,
                            data: opts.ajaxData,
                            cache: opts.ajaxCache,
                            url: url,
                            complete: function(XMLHttpRequest, textStatus) {
                                if (textStatus == 'success' || textStatus == 'notmodified') {
                                    if (opts.ajaxCache) {
                                        $(document.body).data('btCache-' + url.replace(/\./g, ''), XMLHttpRequest.responseText);
                                    }
                                    ajaxTimeout = false;
                                    content = selector ?
                                    // Create a dummy div to hold the results
                                    $("<div/>")
                                    // inject the contents of the document in, removing the scripts
                                    // to avoid any 'Permission Denied' errors in IE
                                    .append(XMLHttpRequest.responseText.replace(/<script(.|\s)*?\/script>/g, ""))
        
                                    // Locate the specified elements
                                    .find(selector) :
        
                                    // If not, just inject the full result
                                    XMLHttpRequest.responseText;
                   
                                }
                                else {
                                    if (textStatus == 'timeout') {
                                        // if there was a timeout, we don't cache the result
                                        ajaxTimeout = true;
                                    }
                                    content = opts.ajaxError.replace(/%error/g, XMLHttpRequest.statusText);
                                }
                                // if the user rolls out of the target element before the ajax request comes back, don't show it
                                if ($(target).hasClass('bt-active')) {
                                    target.btOn();
                                }
                            }
                        }, opts.ajaxOpts);
                        // do the ajax request
                        jQuery.ajax(ajaxOpts);
                        // load the throbber while the magic happens
                        content = opts.ajaxLoading;
                    }
                }
                // </ ajax stuff >
        
  
                // now we start actually figuring out where to place the tip
        
                // figure out how to compensate for the shadow, if present
                var shadowMarginX = 0; // extra added to width to compensate for shadow
                var shadowMarginY = 0; // extra added to height
                var shadowShiftX = 0;  // amount to shift the tip horizontally to allow for shadow
                var shadowShiftY = 0;  // amount to shift vertical
        
                if (opts.shadow && !shadowSupport()) {
                    // if browser doesn't support drop shadows, turn them off
                    opts.shadow = false;
                    // and bring in the noShadows options
                    jQuery.extend(opts, opts.noShadowOpts);
                }
        
                if (opts.shadow) {
                    // figure out horizontal placement
                    if (opts.shadowBlur > Math.abs(opts.shadowOffsetX)) {
                        shadowMarginX = opts.shadowBlur * 2;
                    }
                    else {
                        shadowMarginX = opts.shadowBlur + Math.abs(opts.shadowOffsetX);
                    }
                    shadowShiftX = (opts.shadowBlur - opts.shadowOffsetX) > 0 ? opts.shadowBlur - opts.shadowOffsetX : 0;
          
                    // now vertical
                    if (opts.shadowBlur > Math.abs(opts.shadowOffsetY)) {
                        shadowMarginY = opts.shadowBlur * 2;
                    }
                    else {
                        shadowMarginY = opts.shadowBlur + Math.abs(opts.shadowOffsetY);
                    }
                    shadowShiftY = (opts.shadowBlur - opts.shadowOffsetY) > 0 ? opts.shadowBlur - opts.shadowOffsetY : 0;
                }
        
                if (opts.offsetParent){
                    // if offsetParent is defined by user
                    var offsetParent = $(opts.offsetParent);
                    var offsetParentPos = offsetParent.offset();
                    var pos = $(this).offset();
                    var top = numb(pos.top) - numb(offsetParentPos.top) + numb($(this).css('margin-top')) - shadowShiftY; // IE can return 'auto' for margins
                    var left = numb(pos.left) - numb(offsetParentPos.left) + numb($(this).css('margin-left')) - shadowShiftX;
                }
                else {
                    // if the target element is absolutely positioned, use its parent's offsetParent instead of its own
                    var offsetParent = ($(this).css('position') == 'absolute') ? $(this).parents().eq(0).offsetParent() : $(this).offsetParent();
                    var pos = $(this).btPosition();
                    var top = numb(pos.top) + numb($(this).css('margin-top')) - shadowShiftY; // IE can return 'auto' for margins
                    var left = numb(pos.left) + numb($(this).css('margin-left')) - shadowShiftX;
                }

                var width = $(this).btOuterWidth();
                var height = $(this).outerHeight();
        
                if (typeof content == 'object') {
                    // if content is a DOM object (as opposed to text)
                    // use a clone, rather than removing the original element
                    // and ensure that it's visible
                    var original = content;
                    var clone = $(original).clone(true).show();
                    // also store a reference to the original object in the clone data
                    // and a reference to the clone in the original
                    var origClones = $(original).data('bt-clones') || [];
                    origClones.push(clone);
                    $(original).data('bt-clones', origClones);
                    $(clone).data('bt-orig', original);
                    $(this).data('bt-content-orig', {
                        original: original,
                        clone: clone
                    });
                    content = clone;
                }
                if (typeof content == 'null' || content == '') {
                    // if content is empty, bail out...
                    return;
                }
       
                // create the tip content div, populate it, and style it
                var $text = $('<div class="bt-content"></div>').append(content).css({
                    padding: opts.padding,
                    position: 'absolute',
                    width: (opts.shrinkToFit ? 'auto' : opts.width),
                    zIndex: opts.textzIndex,
                    left: shadowShiftX,
                    top: shadowShiftY
                }).css(opts.cssStyles);
                // create the wrapping box which contains text and canvas
                // put the content in it, style it, and append it to the same offset parent as the target
                var $box = $('<div class="bt-wrapper"></div>').append($text).addClass(opts.cssClass).css({
                    position: 'absolute',
                    width: opts.width,
                    zIndex: opts.wrapperzIndex,
                    visibility:'hidden'
                }).appendTo(offsetParent);
        
                // use bgiframe to get around z-index problems in IE6
                // http://plugins.jquery.com/project/bgiframe
                if (jQuery.fn.bgiframe) {
                    $text.bgiframe();
                    $box.bgiframe();
                }
  
                $(this).data('bt-box', $box);
  
                // see if the text box will fit in the various positions
                var scrollTop = numb($(document).scrollTop());
                var scrollLeft = numb($(document).scrollLeft());
                var docWidth = numb($(window).width());
                var docHeight = numb($(window).height());
                var winRight = scrollLeft + docWidth;
                var winBottom = scrollTop + docHeight;
                var space = new Object();
                var thisOffset = $(this).offset();
                space.top = thisOffset.top - scrollTop;
                space.bottom = docHeight - ((thisOffset + height) - scrollTop);
                space.left = thisOffset.left - scrollLeft;
                space.right = docWidth - ((thisOffset.left + width) - scrollLeft);
                var textOutHeight = numb($text.outerHeight());
                var textOutWidth = numb($text.btOuterWidth());
                if (opts.positions.constructor == String) {
                    opts.positions = opts.positions.replace(/ /, '').split(',');
                }
                if (opts.positions[0] == 'most') {
                    // figure out which is the largest
                    var position = 'top'; // prime the pump
                    for (var pig in space) {  //            <-------  pigs in space!
                        position = space[pig] > space[position] ? pig : position;
                    }
                }
                else {
                    for (var x in opts.positions) {
                        var position = opts.positions[x];
                        // @todo: acommodate shadow space in the following lines...
                        if ((position == 'left' || position == 'right') && space[position] > textOutWidth + opts.spikeLength) {
                            break;
                        }
                        else if ((position == 'top' || position == 'bottom') && space[position] > textOutHeight + opts.spikeLength) {
                            break;
                        }
                    }
                }
  
                // horizontal (left) offset for the box
                var horiz = left + ((width - textOutWidth) * .5);
                // vertical (top) offset for the box
                var vert = top + ((height - textOutHeight) * .5);
                var points = new Array();
                var textTop, textLeft, textRight, textBottom, textTopSpace, textBottomSpace, textLeftSpace, textRightSpace, crossPoint, textCenter, spikePoint;
  
                // Yes, yes, this next bit really could use to be condensed
                // each switch case is basically doing the same thing in slightly different ways
                switch(position) {
          
                    // =================== TOP =======================
                    case 'top':
                        // spike on bottom
                        $text.css('margin-bottom', opts.spikeLength + 'px');
                        $box.css({
                            top: (top - $text.outerHeight(true)) + opts.overlap,
                            left: horiz
                        });
                        // move text left/right if extends out of window
                        textRightSpace = (winRight - opts.windowMargin) - ($text.offset().left + $text.btOuterWidth(true));
                        var xShift = shadowShiftX;
                        if (textRightSpace < 0) {
                            // shift it left
                            $box.css('left', (numb($box.css('left')) + textRightSpace) + 'px');
                            xShift -= textRightSpace;
                        }
                        // we test left space second to ensure that left of box is visible
                        textLeftSpace = ($text.offset().left + numb($text.css('margin-left'))) - (scrollLeft + opts.windowMargin);
                        if (textLeftSpace < 0) {
                            // shift it right
                            $box.css('left', (numb($box.css('left')) - textLeftSpace) + 'px');
                            xShift += textLeftSpace;
                        }
                        textTop = $text.btPosition().top + numb($text.css('margin-top'));
                        textLeft = $text.btPosition().left + numb($text.css('margin-left'));
                        textRight = textLeft + $text.btOuterWidth();
                        textBottom = textTop + $text.outerHeight();
                        textCenter = {
                            x: textLeft + ($text.btOuterWidth()*opts.centerPointX),
                            y: textTop + ($text.outerHeight()*opts.centerPointY)
                            };
                        // points[points.length] = {x: x, y: y};
                        points[points.length] = spikePoint = {
                            y: textBottom + opts.spikeLength,
                            x: ((textRight-textLeft) * .5) + xShift,
                            type: 'spike'
                        };
                        crossPoint = findIntersectX(spikePoint.x, spikePoint.y, textCenter.x, textCenter.y, textBottom);
                        // make sure that the crossPoint is not outside of text box boundaries
                        crossPoint.x = crossPoint.x < textLeft + opts.spikeGirth/2 + opts.cornerRadius ? textLeft + opts.spikeGirth/2 + opts.cornerRadius : crossPoint.x;
                        crossPoint.x =  crossPoint.x > (textRight - opts.spikeGirth/2) - opts.cornerRadius ? (textRight - opts.spikeGirth/2) - opts.CornerRadius : crossPoint.x;
                        points[points.length] = {
                            x: crossPoint.x - (opts.spikeGirth/2),
                            y: textBottom,
                            type: 'join'
                        };
                        points[points.length] = {
                            x: textLeft,
                            y: textBottom,
                            type: 'corner'
                        };  // left bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textTop,
                            type: 'corner'
                        };     // left top corner
                        points[points.length] = {
                            x: textRight,
                            y: textTop,
                            type: 'corner'
                        };    // right top corner
                        points[points.length] = {
                            x: textRight,
                            y: textBottom,
                            type: 'corner'
                        }; // right bottom corner
                        points[points.length] = {
                            x: crossPoint.x + (opts.spikeGirth/2),
                            y: textBottom,
                            type: 'join'
                        };
                        points[points.length] = spikePoint;
                        break;
            
                    // =================== LEFT =======================
                    case 'left':
                        // spike on right
                        $text.css('margin-right', opts.spikeLength + 'px');
                        $box.css({
                            top: vert + 'px',
                            left: ((left - $text.btOuterWidth(true)) + opts.overlap) + 'px'
                            });
                        // move text up/down if extends out of window
                        textBottomSpace = (winBottom - opts.windowMargin) - ($text.offset().top + $text.outerHeight(true));
                        var yShift = shadowShiftY;
                        if (textBottomSpace < 0) {
                            // shift it up
                            $box.css('top', (numb($box.css('top')) + textBottomSpace) + 'px');
                            yShift -= textBottomSpace;
                        }
                        // we ensure top space second to ensure that top of box is visible
                        textTopSpace = ($text.offset().top + numb($text.css('margin-top'))) - (scrollTop + opts.windowMargin);
                        if (textTopSpace < 0) {
                            // shift it down
                            $box.css('top', (numb($box.css('top')) - textTopSpace) + 'px');
                            yShift += textTopSpace;
                        }
                        textTop = $text.btPosition().top + numb($text.css('margin-top'));
                        textLeft = $text.btPosition().left + numb($text.css('margin-left'));
                        textRight = textLeft + $text.btOuterWidth();
                        textBottom = textTop + $text.outerHeight();
                        textCenter = {
                            x: textLeft + ($text.btOuterWidth()*opts.centerPointX),
                            y: textTop + ($text.outerHeight()*opts.centerPointY)
                            };
                        points[points.length] = spikePoint = {
                            x: textRight + opts.spikeLength,
                            y: ((textBottom-textTop) * .5) + yShift,
                            type: 'spike'
                        };
                        crossPoint = findIntersectY(spikePoint.x, spikePoint.y, textCenter.x, textCenter.y, textRight);
                        // make sure that the crossPoint is not outside of text box boundaries
                        crossPoint.y = crossPoint.y < textTop + opts.spikeGirth/2 + opts.cornerRadius ? textTop + opts.spikeGirth/2 + opts.cornerRadius : crossPoint.y;
                        crossPoint.y =  crossPoint.y > (textBottom - opts.spikeGirth/2) - opts.cornerRadius ? (textBottom - opts.spikeGirth/2) - opts.cornerRadius : crossPoint.y;
                        points[points.length] = {
                            x: textRight,
                            y: crossPoint.y + opts.spikeGirth/2,
                            type: 'join'
                        };
                        points[points.length] = {
                            x: textRight,
                            y: textBottom,
                            type: 'corner'
                        }; // right bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textBottom,
                            type: 'corner'
                        };  // left bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textTop,
                            type: 'corner'
                        };     // left top corner
                        points[points.length] = {
                            x: textRight,
                            y: textTop,
                            type: 'corner'
                        };    // right top corner
                        points[points.length] = {
                            x: textRight,
                            y: crossPoint.y - opts.spikeGirth/2,
                            type: 'join'
                        };
                        points[points.length] = spikePoint;
                        break;
            
                    // =================== BOTTOM =======================
                    case 'bottom':
                        // spike on top
                        $text.css('margin-top', opts.spikeLength + 'px');
                        $box.css({
                            top: (top + height) - opts.overlap,
                            left: horiz
                        });
                        // move text up/down if extends out of window
                        textRightSpace = (winRight - opts.windowMargin) - ($text.offset().left + $text.btOuterWidth(true));
                        var xShift = shadowShiftX;
                        if (textRightSpace < 0) {
                            // shift it left
                            $box.css('left', (numb($box.css('left')) + textRightSpace) + 'px');
                            xShift -= textRightSpace;
                        }
                        // we ensure left space second to ensure that left of box is visible
                        textLeftSpace = ($text.offset().left + numb($text.css('margin-left')))  - (scrollLeft + opts.windowMargin);
                        if (textLeftSpace < 0) {
                            // shift it right
                            $box.css('left', (numb($box.css('left')) - textLeftSpace) + 'px');
                            xShift += textLeftSpace;
                        }
                        textTop = $text.btPosition().top + numb($text.css('margin-top'));
                        textLeft = $text.btPosition().left + numb($text.css('margin-left'));
                        textRight = textLeft + $text.btOuterWidth();
                        textBottom = textTop + $text.outerHeight();
                        textCenter = {
                            x: textLeft + ($text.btOuterWidth()*opts.centerPointX),
                            y: textTop + ($text.outerHeight()*opts.centerPointY)
                            };
                        points[points.length] = spikePoint = {
                            x: ((textRight-textLeft) * .5) + xShift,
                            y: shadowShiftY,
                            type: 'spike'
                        };
                        crossPoint = findIntersectX(spikePoint.x, spikePoint.y, textCenter.x, textCenter.y, textTop);
                        // make sure that the crossPoint is not outside of text box boundaries
                        crossPoint.x = crossPoint.x < textLeft + opts.spikeGirth/2 + opts.cornerRadius ? textLeft + opts.spikeGirth/2 + opts.cornerRadius : crossPoint.x;
                        crossPoint.x =  crossPoint.x > (textRight - opts.spikeGirth/2) - opts.cornerRadius ? (textRight - opts.spikeGirth/2) - opts.cornerRadius : crossPoint.x;
                        points[points.length] = {
                            x: crossPoint.x + opts.spikeGirth/2,
                            y: textTop,
                            type: 'join'
                        };
                        points[points.length] = {
                            x: textRight,
                            y: textTop,
                            type: 'corner'
                        };    // right top corner
                        points[points.length] = {
                            x: textRight,
                            y: textBottom,
                            type: 'corner'
                        }; // right bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textBottom,
                            type: 'corner'
                        };  // left bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textTop,
                            type: 'corner'
                        };     // left top corner
                        points[points.length] = {
                            x: crossPoint.x - (opts.spikeGirth/2),
                            y: textTop,
                            type: 'join'
                        };
                        points[points.length] = spikePoint;
                        break;
          
                    // =================== RIGHT =======================
                    case 'right':
                        // spike on left
                        $text.css('margin-left', (opts.spikeLength + 'px'));
                        $box.css({
                            top: vert + 'px',
                            left: ((left + width) - opts.overlap) + 'px'
                            });
                        // move text up/down if extends out of window
                        textBottomSpace = (winBottom - opts.windowMargin) - ($text.offset().top + $text.outerHeight(true));
                        var yShift = shadowShiftY;
                        if (textBottomSpace < 0) {
                            // shift it up
                            $box.css('top', (numb($box.css('top')) + textBottomSpace) + 'px');
                            yShift -= textBottomSpace;
                        }
                        // we ensure top space second to ensure that top of box is visible
                        textTopSpace = ($text.offset().top + numb($text.css('margin-top'))) - (scrollTop + opts.windowMargin);
                        if (textTopSpace < 0) {
                            // shift it down
                            $box.css('top', (numb($box.css('top')) - textTopSpace) + 'px');
                            yShift += textTopSpace;
                        }
                        textTop = $text.btPosition().top + numb($text.css('margin-top'));
                        textLeft = $text.btPosition().left + numb($text.css('margin-left'));
                        textRight = textLeft + $text.btOuterWidth();
                        textBottom = textTop + $text.outerHeight();
                        textCenter = {
                            x: textLeft + ($text.btOuterWidth()*opts.centerPointX),
                            y: textTop + ($text.outerHeight()*opts.centerPointY)
                            };
                        points[points.length] = spikePoint = {
                            x: shadowShiftX,
                            y: ((textBottom-textTop) * .5) + yShift,
                            type: 'spike'
                        };
                        crossPoint = findIntersectY(spikePoint.x, spikePoint.y, textCenter.x, textCenter.y, textLeft);
                        // make sure that the crossPoint is not outside of text box boundaries
                        crossPoint.y = crossPoint.y < textTop + opts.spikeGirth/2 + opts.cornerRadius ? textTop + opts.spikeGirth/2 + opts.cornerRadius : crossPoint.y;
                        crossPoint.y =  crossPoint.y > (textBottom - opts.spikeGirth/2) - opts.cornerRadius ? (textBottom - opts.spikeGirth/2) - opts.cornerRadius : crossPoint.y;
                        points[points.length] = {
                            x: textLeft,
                            y: crossPoint.y - opts.spikeGirth/2,
                            type: 'join'
                        };
                        points[points.length] = {
                            x: textLeft,
                            y: textTop,
                            type: 'corner'
                        };     // left top corner
                        points[points.length] = {
                            x: textRight,
                            y: textTop,
                            type: 'corner'
                        };    // right top corner
                        points[points.length] = {
                            x: textRight,
                            y: textBottom,
                            type: 'corner'
                        }; // right bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: textBottom,
                            type: 'corner'
                        };  // left bottom corner
                        points[points.length] = {
                            x: textLeft,
                            y: crossPoint.y + opts.spikeGirth/2,
                            type: 'join'
                        };
                        points[points.length] = spikePoint;
                        break;
                } // </ switch >
        
                var canvas = document.createElement('canvas');
                $(canvas).attr('width', (numb($text.btOuterWidth(true)) + opts.strokeWidth*2 + shadowMarginX)).attr('height', (numb($text.outerHeight(true)) + opts.strokeWidth*2 + shadowMarginY)).appendTo($box).css({
                    position: 'relative',
                    zIndex: opts.boxzIndex
                    });

  
                // if excanvas is set up, we need to initialize the new canvas element
                if (typeof G_vmlCanvasManager != 'undefined') {
                    canvas = G_vmlCanvasManager.initElement(canvas);
                }
  
                if (opts.cornerRadius > 0) {
                    // round the corners!
                    var newPoints = new Array();
                    var newPoint;
                    for (var i=0; i<points.length; i++) {
                        if (points[i].type == 'corner') {
                            // create two new arc points
                            // find point between this and previous (using modulo in case of ending)
                            newPoint = betweenPoint(points[i], points[(i-1)%points.length], opts.cornerRadius);
                            newPoint.type = 'arcStart';
                            newPoints[newPoints.length] = newPoint;
                            // the original corner point
                            newPoints[newPoints.length] = points[i];
                            // find point between this and next
                            newPoint = betweenPoint(points[i], points[(i+1)%points.length], opts.cornerRadius);
                            newPoint.type = 'arcEnd';
                            newPoints[newPoints.length] = newPoint;
                        }
                        else {
                            newPoints[newPoints.length] = points[i];
                        }
                    }
                    // overwrite points with new version
                    points = newPoints;
                }
        
                var ctx = canvas.getContext("2d");
        
                if (opts.shadow && opts.shadowOverlap !== true) {
          
                    var shadowOverlap = numb(opts.shadowOverlap);
          
                    // keep the shadow (and canvas) from overlapping the target element
                    switch (position) {
                        case 'top':
                            if (opts.shadowOffsetX + opts.shadowBlur - shadowOverlap > 0) {
                                $box.css('top', (numb($box.css('top')) - (opts.shadowOffsetX + opts.shadowBlur - shadowOverlap)));
                            }
                            break;
                        case 'right':
                            if (shadowShiftX - shadowOverlap > 0) {
                                $box.css('left', (numb($box.css('left')) + shadowShiftX - shadowOverlap));
                            }
                            break;
                        case 'bottom':
                            if (shadowShiftY - shadowOverlap > 0) {
                                $box.css('top', (numb($box.css('top')) + shadowShiftY - shadowOverlap));
                            }
                            break;
                        case 'left':
                            if (opts.shadowOffsetY + opts.shadowBlur - shadowOverlap > 0) {
                                $box.css('left', (numb($box.css('left')) - (opts.shadowOffsetY + opts.shadowBlur - shadowOverlap)));
                            }
                            break;
                    }
                }
  
                drawIt.apply(ctx, [points], opts.strokeWidth);
                ctx.fillStyle = opts.fill;
                if (opts.shadow) {
                    ctx.shadowOffsetX = opts.shadowOffsetX;
                    ctx.shadowOffsetY = opts.shadowOffsetY;
                    ctx.shadowBlur = opts.shadowBlur;
                    ctx.shadowColor =  opts.shadowColor;
                }
                ctx.closePath();
                ctx.fill();
                if (opts.strokeWidth > 0) {
                    ctx.shadowColor = 'rgba(0, 0, 0, 0)'; //remove shadow from stroke
                    ctx.lineWidth = opts.strokeWidth;
                    ctx.strokeStyle = opts.strokeStyle;
                    ctx.beginPath();
                    drawIt.apply(ctx, [points], opts.strokeWidth);
                    ctx.closePath();
                    ctx.stroke();
                }
          
                // trigger preShow function
                // function receives the box element (the balloon wrapper div) as an argument
                opts.preShow.apply(this, [$box[0]]);
        
                // switch from visibility: hidden to display: none so we can run animations
                $box.css({
                    display:'none',
                    visibility: 'visible'
                });
  
                // Here's where we show the tip
                opts.showTip.apply(this, [$box[0]]);
          
                if (opts.overlay) {
                    // EXPERIMENTAL AND FOR TESTING ONLY!!!!
                    var overlay = $('<div class="bt-overlay"></div>').css({
                        position: 'absolute',
                        backgroundColor: 'blue',
                        top: top,
                        left: left,
                        width: width,
                        height: height,
                        opacity: '.2'
                    }).appendTo(offsetParent);
                    $(this).data('overlay', overlay);
                }
        
                if ((opts.ajaxPath != null && opts.ajaxCache == false) || ajaxTimeout) {
                    // if ajaxCache is not enabled or if there was a server timeout,
                    // remove the content variable so it will be loaded again from server
                    content = false;
                }
        
                // stick this element into the clickAnywhereToClose stack
                if (opts.clickAnywhereToClose) {
                    jQuery.bt.vars.clickAnywhereStack.push(this);
                    $(document).click(jQuery.bt.docClick);
                }
        
                // stick this element into the closeWhenOthersOpen stack
                if (opts.closeWhenOthersOpen) {
                    jQuery.bt.vars.closeWhenOpenStack.push(this);
                }
  
                // trigger postShow function
                // function receives the box element (the balloon wrapper div) as an argument
                opts.postShow.apply(this, [$box[0]]);
  
  
            }; // </ turnOn() >
  
            this.btOff = function() {
      
                var box = $(this).data('bt-box');
  
                // trigger preHide function
                // function receives the box element (the balloon wrapper div) as an argument
                opts.preHide.apply(this, [box]);
        
                var i = this;
        
                // set up the stuff to happen AFTER the tip is hidden
                i.btCleanup = function(){
                    var box = $(i).data('bt-box');
                    var contentOrig = $(i).data('bt-content-orig');
                    var overlay = $(i).data('bt-overlay');
                    if (typeof box == 'object') {
                        $(box).remove();
                        $(i).removeData('bt-box');
                    }
                    if (typeof contentOrig == 'object') {
                        var clones = $(contentOrig.original).data('bt-clones');
                        $(contentOrig).data('bt-clones', arrayRemove(clones, contentOrig.clone));
                    }
                    if (typeof overlay == 'object') {
                        $(overlay).remove();
                        $(i).removeData('bt-overlay');
                    }
          
                    // remove this from the stacks
                    jQuery.bt.vars.clickAnywhereStack = arrayRemove(jQuery.bt.vars.clickAnywhereStack, i);
                    jQuery.bt.vars.closeWhenOpenStack = arrayRemove(jQuery.bt.vars.closeWhenOpenStack, i);
          
                    // remove the 'bt-active' and activeClass classes from target
                    $(i).removeClass('bt-active ' + opts.activeClass);
          
                    // trigger postHide function
                    // no box argument since it has been removed from the DOM
                    opts.postHide.apply(i);
          
                }
        
                opts.hideTip.apply(this, [box, i.btCleanup]);

            }; // </ turnOff() >
  
            var refresh = this.btRefresh = function() {
                this.btOff();
                this.btOn();
            };
  
        }); // </ this.each() >
  
  
    function drawIt(points, strokeWidth) {
        this.moveTo(points[0].x, points[0].y);
        for (i=1;i<points.length;i++) {
            if (points[i-1].type == 'arcStart') {
                // if we're creating a rounded corner
                //ctx.arc(round5(points[i].x), round5(points[i].y), points[i].startAngle, points[i].endAngle, opts.cornerRadius, false);
                this.quadraticCurveTo(round5(points[i].x, strokeWidth), round5(points[i].y, strokeWidth), round5(points[(i+1)%points.length].x, strokeWidth), round5(points[(i+1)%points.length].y, strokeWidth));
                i++;
            //ctx.moveTo(round5(points[i].x), round5(points[i].y));
            }
            else {
                this.lineTo(round5(points[i].x, strokeWidth), round5(points[i].y, strokeWidth));
            }
        }
    }; // </ drawIt() >
  
    /**
     * For odd stroke widths, round to the nearest .5 pixel to avoid antialiasing
     * http://developer.mozilla.org/en/Canvas_tutorial/Applying_styles_and_colors
     */
    function round5(num, strokeWidth) {
        var ret;
        strokeWidth = numb(strokeWidth);
        if (strokeWidth%2) {
            ret = num;
        }
        else {
            ret = Math.round(num - .5) + .5;
        }
        return ret;
    }; // </ round5() >
  
    /**
     * Ensure that a number is a number... or zero
     */
    function numb(num) {
        return parseInt(num) || 0;
    }; // </ numb() >
    
    /**
     * Remove an element from an array
     */ 
    function arrayRemove(arr, elem) {
        var x, newArr = new Array();
        for (x in arr) {
            if (arr[x] != elem) {
                newArr.push(arr[x]);
            }
        }
        return newArr;
    }; // </ arrayRemove() >
    
    /**
     * Does the current browser support canvas?
     * This is a variation of http://code.google.com/p/browser-canvas-support/
     */
    function canvasSupport() {
        var canvas_compatible = false;
        try {
            canvas_compatible = !!(document.createElement('canvas').getContext('2d')); // S60
        } catch(e) {
            canvas_compatible = !!(document.createElement('canvas').getContext); // IE
        }
        return canvas_compatible;
    }
    
    /**
     * Does the current browser support canvas drop shadows?
     */
    function shadowSupport() {
      
        // to test for drop shadow support in the current browser, uncomment the next line
        // return true;
    
        // until a good feature-detect is found, we have to look at user agents
        try {
            var userAgent = navigator.userAgent.toLowerCase();
            if (/webkit/.test(userAgent)) {
                // WebKit.. let's go!
                return true;
            }
            else if (/gecko|mozilla/.test(userAgent) && parseFloat(userAgent.match(/firefox\/(\d+(?:\.\d+)+)/)[1]) >= 3.1){
                // Mozilla 3.1 or higher
                return true;
            }
        }
        catch(err) {
        // if there's an error, just keep going, we'll assume that drop shadows are not supported
        }
            
        return false;
      
    } // </ shadowSupport() >
  
    /**
     * Given two points, find a point which is dist pixels from point1 on a line to point2
     */
    function betweenPoint(point1, point2, dist) {
        // figure out if we're horizontal or vertical
        var y, x;
        if (point1.x == point2.x) {
            // vertical
            y = point1.y < point2.y ? point1.y + dist : point1.y - dist;
            return {
                x: point1.x,
                y: y
            };
        }
        else if (point1.y == point2.y) {
            // horizontal
            x = point1.x < point2.x ? point1.x + dist : point1.x - dist;
            return {
                x:x,
                y: point1.y
                };
        }
    }; // </ betweenPoint() >
  
    function centerPoint(arcStart, corner, arcEnd) {
        var x = corner.x == arcStart.x ? arcEnd.x : arcStart.x;
        var y = corner.y == arcStart.y ? arcEnd.y : arcStart.y;
        var startAngle, endAngle;
        if (arcStart.x < arcEnd.x) {
            if (arcStart.y > arcEnd.y) {
                // arc is on upper left
                startAngle = (Math.PI/180)*180;
                endAngle = (Math.PI/180)*90;
            }
            else {
                // arc is on upper right
                startAngle = (Math.PI/180)*90;
                endAngle = 0;
            }
        }
        else {
            if (arcStart.y > arcEnd.y) {
                // arc is on lower left
                startAngle = (Math.PI/180)*270;
                endAngle = (Math.PI/180)*180;
            }
            else {
                // arc is on lower right
                startAngle = 0;
                endAngle = (Math.PI/180)*270;
            }
        }
        return {
            x: x,
            y: y,
            type: 'center',
            startAngle: startAngle,
            endAngle: endAngle
        };
    }; // </ centerPoint() >
  
    /**
     * Find the intersection point of two lines, each defined by two points
     * arguments are x1, y1 and x2, y2 for r1 (line 1) and r2 (line 2)
     * It's like an algebra party!!!
     */
    function findIntersect(r1x1, r1y1, r1x2, r1y2, r2x1, r2y1, r2x2, r2y2) {
  
        if (r2x1 == r2x2) {
            return findIntersectY(r1x1, r1y1, r1x2, r1y2, r2x1);
        }
        if (r2y1 == r2y2) {
            return findIntersectX(r1x1, r1y1, r1x2, r1y2, r2y1);
        }
  
        // m = (y1 - y2) / (x1 - x2)  // <-- how to find the slope
        // y = mx + b                 // the 'classic' linear equation
        // b = y - mx                 // how to find b (the y-intersect)
        // x = (y - b)/m              // how to find x
        var r1m = (r1y1 - r1y2) / (r1x1 - r1x2);
        var r1b = r1y1 - (r1m * r1x1);
        var r2m = (r2y1 - r2y2) / (r2x1 - r2x2);
        var r2b = r2y1 - (r2m * r2x1);
  
        var x = (r2b - r1b) / (r1m - r2m);
        var y = r1m * x + r1b;
  
        return {
            x: x,
            y: y
        };
    }; // </ findIntersect() >
  
    /**
     * Find the y intersection point of a line and given x vertical
     */
    function findIntersectY(r1x1, r1y1, r1x2, r1y2, x) {
        if (r1y1 == r1y2) {
            return {
                x: x,
                y: r1y1
            };
        }
        var r1m = (r1y1 - r1y2) / (r1x1 - r1x2);
        var r1b = r1y1 - (r1m * r1x1);
  
        var y = r1m * x + r1b;
  
        return {
            x: x,
            y: y
        };
    }; // </ findIntersectY() >
  
    /**
     * Find the x intersection point of a line and given y horizontal
     */
    function findIntersectX(r1x1, r1y1, r1x2, r1y2, y) {
        if (r1x1 == r1x2) {
            return {
                x: r1x1,
                y: y
            };
        }
        var r1m = (r1y1 - r1y2) / (r1x1 - r1x2);
        var r1b = r1y1 - (r1m * r1x1);
  
        // y = mx + b     // your old friend, linear equation
        // x = (y - b)/m  // linear equation solved for x
        var x = (y - r1b) / r1m;
  
        return {
            x: x,
            y: y
        };
  
    }; // </ findIntersectX() >
  
}; // </ jQuery.fn.bt() >
  
/**
   * jQuery's compat.js (used in Drupal's jQuery upgrade module, overrides the $().position() function
   *  this is a copy of that function to allow the plugin to work when compat.js is present
   *  once compat.js is fixed to not override existing functions, this function can be removed
   *  and .btPosion() can be replaced with .position() above...
   */
jQuery.fn.btPosition = function() {
  
    function num(elem, prop) {
        return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
    };
  
    var left = 0, top = 0, results;
  
    if ( this[0] ) {
        // Get *real* offsetParent
        var offsetParent = this.offsetParent(),
  
        // Get correct offsets
        offset       = this.offset(),
        parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? {
            top: 0,
            left: 0
        } : offsetParent.offset();
  
        // Subtract element margins
        // note: when an element has margin: auto the offsetLeft and marginLeft
        // are the same in Safari causing offset.left to incorrectly be 0
        offset.top  -= num( this, 'marginTop' );
        offset.left -= num( this, 'marginLeft' );
  
        // Add offsetParent borders
        parentOffset.top  += num( offsetParent, 'borderTopWidth' );
        parentOffset.left += num( offsetParent, 'borderLeftWidth' );
  
        // Subtract the two offsets
        results = {
            top:  offset.top  - parentOffset.top,
            left: offset.left - parentOffset.left
        };
    }
  
    return results;
}; // </ jQuery.fn.btPosition() >
  
  
/**
  * jQuery's dimensions.js overrides the $().btOuterWidth() function
  *  this is a copy of original jQuery's outerWidth() function to 
  *  allow the plugin to work when dimensions.js is present
  */
jQuery.fn.btOuterWidth = function(margin) {
  
    function num(elem, prop) {
        return elem[0] && parseInt(jQuery.curCSS(elem[0], prop, true), 10) || 0;
    };
  
    return this["innerWidth"]()
    + num(this, "borderLeftWidth")
    + num(this, "borderRightWidth")
    + (margin ? num(this, "marginLeft")
        + num(this, "marginRight") : 0);
  
}; // </ jQuery.fn.btOuterWidth() >
  
/**
   * A convenience function to run btOn() (if available)
   * for each selected item
   */
jQuery.fn.btOn = function() {
	 
    return this.each(function(index){
        if (jQuery.isFunction(this.btOn)) {
            this.btOn();
        }
    });
}; // </ $().btOn() >
  
/**
   * 
   * A convenience function to run btOff() (if available)
   * for each selected item
   */
jQuery.fn.btOff = function() {
    return this.each(function(index){
        if (jQuery.isFunction(this.btOff)) {
            this.btOff();
        }
    });
}; // </ $().btOff() >
  
jQuery.bt.vars = {
    clickAnywhereStack: [],
    closeWhenOpenStack: []
};
  
/**
   * This function gets bound to the document's click event
   * It turns off all of the tips in the click-anywhere-to-close stack
   */
jQuery.bt.docClick = function(e) {
    if (!e) {
        var e = window.event;
    };
    // if clicked element is a child of neither a tip NOR a target
    // and there are tips in the stack
    if (!$(e.target).parents().andSelf().filter('.bt-wrapper, .bt-active').length && jQuery.bt.vars.clickAnywhereStack.length) {
        // if clicked element isn't inside tip, close tips in stack
        $(jQuery.bt.vars.clickAnywhereStack).btOff();
        $(document).unbind('click', jQuery.bt.docClick);
    }
}; // </ docClick() >
  
/**
   * Defaults for the beauty tips
   *
   * Note this is a variable definition and not a function. So defaults can be
   * written for an entire page by simply redefining attributes like so:
   *
   *   jQuery.bt.options.width = 400;
   *
   * Be sure to use *jQuery.bt.options* and not jQuery.bt.defaults when overriding
   *
   * This would make all Beauty Tips boxes 400px wide.
   *
   * Each of these options may also be overridden during
   *
   * Can be overriden globally or at time of call.
   *
   */
jQuery.bt.defaults = {
    trigger:         'hover',                // trigger to show/hide tip
    // use [on, off] to define separate on/off triggers
    // also use space character to allow multiple  to trigger
    // examples:
    //   ['focus', 'blur'] // focus displays, blur hides
    //   'dblclick'        // dblclick toggles on/off
    //   ['focus mouseover', 'blur mouseout'] // multiple triggers
    //   'now'             // shows/hides tip without event
    //   'none'            // use $('#selector').btOn(); and ...btOff();
    //   'hoverIntent'     // hover using hoverIntent plugin (settings below)
    // note:
    //   hoverIntent becomes default if available
                                             
    clickAnywhereToClose: true,              // clicking anywhere outside of the tip will close it 
    closeWhenOthersOpen: false,              // tip will be closed before another opens - stop >= 2 tips being on
                                             
    shrinkToFit:      false,                 // should short single-line content get a narrower balloon?
    width:            '200px',               // width of tooltip box
    
    padding:          '10px',                // padding for content (get more fine grained with cssStyles)
    spikeGirth:       10,                    // width of spike
    spikeLength:      15,                    // length of spike
    overlap:          0,                     // spike overlap (px) onto target (can cause problems with 'hover' trigger)
    overlay:          false,                 // display overlay on target (use CSS to style) -- BUGGY!
    killTitle:        true,                  // kill title tags to avoid double tooltips
  
    textzIndex:       9999,                  // z-index for the text
    boxzIndex:        9998,                  // z-index for the "talk" box (should always be less than textzIndex)
    wrapperzIndex:    9997,
    offsetParent:     null,                  // DOM node to append the tooltip into.
    // Must be positioned relative or absolute. Can be selector or object
    positions:        ['most'],              // preference of positions for tip (will use first with available space)
    // possible values 'top', 'bottom', 'left', 'right' as an array in order of
    // preference. Last value will be used if others don't have enough space.
    // or use 'most' to use the area with the most space
    fill:             "rgb(255, 255, 102)",  // fill color for the tooltip box, you can use any CSS-style color definition method
    // http://www.w3.org/TR/css3-color/#numerical - not all methods have been tested
    
    windowMargin:     10,                    // space (px) to leave between text box and browser edge
  
    strokeWidth:      1,                     // width of stroke around box, **set to 0 for no stroke**
    strokeStyle:      "#000",                // color/alpha of stroke
  
    cornerRadius:     5,                     // radius of corners (px), set to 0 for square corners
    
    // following values are on a scale of 0 to 1 with .5 being centered
    
    centerPointX:     .5,                    // the spike extends from center of the target edge to this point
    centerPointY:     .5,                    // defined by percentage horizontal (x) and vertical (y)
      
    shadow:           false,                 // use drop shadow? (only displays in Safari and FF 3.1) - experimental
    shadowOffsetX:    2,                     // shadow offset x (px)
    shadowOffsetY:    2,                     // shadow offset y (px)
    shadowBlur:       3,                     // shadow blur (px)
    shadowColor:      "#000",                // shadow color/alpha
    shadowOverlap:   false,                  // when shadows overlap the target element it can cause problem with hovering
    // set this to true to overlap or set to a numeric value to define the amount of overlap
    noShadowOpts:     {
        strokeStyle: '#999'
    },  // use this to define 'fall-back' options for browsers which don't support drop shadows
    
    cssClass:         '',                    // CSS class to add to the box wrapper div (of the TIP)
    cssStyles:        {},                    // styles to add the text box
    //   example: {fontFamily: 'Georgia, Times, serif', fontWeight: 'bold'}
                                                 
    activeClass:      'bt-active',           // class added to TARGET element when its BeautyTip is active
  
    contentSelector:  "$(this).attr('title')", // if there is no content argument, use this selector to retrieve the title
    // a function which returns the content may also be passed here
  
    ajaxPath:         null,                  // if using ajax request for content, this contains url and (opt) selector
    // this will override content and contentSelector
    // examples (see jQuery load() function):
    //   '/demo.html'
    //   '/help/ajax/snip'
    //   '/help/existing/full div#content'
                                             
    // ajaxPath can also be defined as an array
    // in which case, the first value will be parsed as a jQuery selector
    // the result of which will be used as the ajaxPath
    // the second (optional) value is the content selector as above
    // examples:
    //    ["$(this).attr('href')", 'div#content']
    //    ["$(this).parents('.wrapper').find('.title').attr('href')"]
    //    ["$('#some-element').val()"]
                                             
    ajaxError:        '<strong>ERROR:</strong> <em>%error</em>',
    // error text, use "%error" to insert error from server
    ajaxLoading:     '<blink>Loading...</blink>',  // yes folks, it's the blink tag!
    ajaxData:         {},                    // key/value pairs
    ajaxType:         'GET',                 // 'GET' or 'POST'
    ajaxCache:        true,                  // cache ajax results and do not send request to same url multiple times
    ajaxOpts:         {},                    // any other ajax options - timeout, passwords, processing functions, etc...
    // see http://docs.jquery.com/Ajax/jQuery.ajax#options
                                      
    preBuild:         function(){},          // function to run before popup is built
    preShow:          function(box){},       // function to run before popup is displayed
    showTip:          function(box){
        $(box).show();
    },
    postShow:         function(box){},       // function to run after popup is built and displayed
    
    preHide:          function(box){},       // function to run before popup is removed
    hideTip:          function(box, callback) {
        $(box).hide();
        callback();   // you MUST call "callback" at the end of your animations
    },
    postHide:         function(){},          // function to run after popup is removed
    
    hoverIntentOpts:  {                          // options for hoverIntent (if installed)
        interval: 300,           // http://cherne.net/brian/resources/jquery.hoverIntent.html
        timeout: 500
    }
                                                 
}; // </ jQuery.bt.defaults >
  
jQuery.bt.options = {};

})(jQuery);

// @todo
// use larger canvas (extend to edge of page when windowMargin is active)
// add options to shift position of tip vert/horiz and position of spike tip
// create drawn (canvas) shadows
// use overlay to allow overlap with hover
// experiment with making tooltip a subelement of the target
// handle non-canvas-capable browsers elegantly