/*
 * jQuery UI Draggable
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Draggables
 *
 * Depends:
 *  ui.core.js
 */
(function($) {

$.widget("ui.draggable", $.extend($.ui.mouse, {
  init: function() {
    
    //Initialize needed constants
    var o = this.options;

    //Position the node
    if (o.helper == 'original' && !(/(relative|absolute|fixed)/).test(this.element.css('position')))
      this.element.css('position', 'relative');

    this.element.addClass('ui-draggable');
    (o.disabled && this.element.addClass('ui-draggable-disabled'));
    
    this.mouseInit();
    
  },
  mouseStart: function(e) {
    var o = this.options;
    
    if (this.helper || o.disabled || $(e.target).is('.ui-resizable-handle')) return false;
    
    var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
    
  
    $(this.options.handle, this.element).find("*").andSelf().each(function() {
      if(this == e.target) handle = true;
    });
    if (!handle) return false;
    
    if($.ui.ddmanager) $.ui.ddmanager.current = this;
    
    //Create and append the visible helper
    this.helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [e])) : (o.helper == 'clone' ? this.element.clone() : this.element);
    if(!this.helper.parents('body').length) this.helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));
    if(this.helper[0] != this.element[0] && !(/(fixed|absolute)/).test(this.helper.css("position"))) this.helper.css("position", "absolute");
    
    /*
     * - Position generation -
     * This block generates everything position related - it's the core of draggables.
     */
    
    this.margins = {                                        //Cache the margins
      left: (parseInt(this.element.css("marginLeft"),10) || 0),
      top: (parseInt(this.element.css("marginTop"),10) || 0)
    };    
    
    this.cssPosition = this.helper.css("position");                         //Store the helper's css position
    this.offset = this.element.offset();                              //The element's absolute position on the page
    this.offset = {                                         //Substract the margins from the element's absolute offset
      top: this.offset.top - this.margins.top,
      left: this.offset.left - this.margins.left
    };
    
    this.offset.click = {                                     //Where the click happened, relative to the element
      left: e.pageX - this.offset.left,
      top: e.pageY - this.offset.top
    };
    
    this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset();      //Get the offsetParent and cache its position
    if(this.offsetParent[0] == document.body && $.browser.mozilla) po = { top: 0, left: 0 };    //Ugly FF3 fix
    this.offset.parent = {                                      //Store its position plus border
      top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
      left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
    };
    
    var p = this.element.position();                                //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helpers
    this.offset.relative = this.cssPosition == "relative" ? {
      top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.offsetParent[0].scrollTop,
      left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.offsetParent[0].scrollLeft
    } : { top: 0, left: 0 };
    
    this.originalPosition = this.generatePosition(e);                       //Generate the original position
    this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };//Cache the helper size
    
    if(o.cursorAt) {
      if(o.cursorAt.left != undefined) this.offset.click.left = o.cursorAt.left + this.margins.left;
      if(o.cursorAt.right != undefined) this.offset.click.left = this.helperProportions.width - o.cursorAt.right + this.margins.left;
      if(o.cursorAt.top != undefined) this.offset.click.top = o.cursorAt.top + this.margins.top;
      if(o.cursorAt.bottom != undefined) this.offset.click.top = this.helperProportions.height - o.cursorAt.bottom + this.margins.top;
    }
    
    
    /*
     * - Position constraining -
     * Here we prepare position constraining like grid and containment.
     */ 
    
    if(o.containment) {
      if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
      if(o.containment == 'document' || o.containment == 'window') this.containment = [
        0 - this.offset.relative.left - this.offset.parent.left,
        0 - this.offset.relative.top - this.offset.parent.top,
        $(o.containment == 'document' ? document : window).width() - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
        ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
      ];
      
      if(!(/^(document|window|parent)$/).test(o.containment)) {
        var ce = $(o.containment)[0];
        var co = $(o.containment).offset();
        
        this.containment = [
          co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left,
          co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top,
          co.left+Math.max(ce.scrollWidth,ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
          co.top+Math.max(ce.scrollHeight,ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
        ];
      }
    }
    
    //Call plugins and callbacks
    this.propagate("start", e);
    
    this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };//Recache the helper size
    if ($.ui.ddmanager && !o.dropBehaviour) $.ui.ddmanager.prepareOffsets(this, e);
    
    this.helper.addClass("ui-draggable-dragging");
    this.mouseDrag(e); //Execute the drag once - this causes the helper not to be visible before getting its correct position
    return true;
  },
  convertPositionTo: function(d, pos) {
    if(!pos) pos = this.position;
    var mod = d == "absolute" ? 1 : -1;
    return {
      top: (
        pos.top                                 // the calculated relative position
        + this.offset.relative.top  * mod                   // Only for relative positioned nodes: Relative offset from element to offset parent
        + this.offset.parent.top * mod                      // The offsetParent's offset without borders (offset + border)
        - (this.cssPosition == "fixed" || (this.cssPosition == "absolute" && this.offsetParent[0] == document.body) ? 0 : this.offsetParent[0].scrollTop) * mod // The offsetParent's scroll position, not if the element is fixed
        + (this.cssPosition == "fixed" ? $(document).scrollTop() : 0) * mod
        + this.margins.top * mod                        //Add the margin (you don't want the margin counting in intersection methods)
      ),
      left: (
        pos.left                                // the calculated relative position
        + this.offset.relative.left * mod                   // Only for relative positioned nodes: Relative offset from element to offset parent
        + this.offset.parent.left * mod                     // The offsetParent's offset without borders (offset + border)
        - (this.cssPosition == "fixed" || (this.cssPosition == "absolute" && this.offsetParent[0] == document.body) ? 0 : this.offsetParent[0].scrollLeft) * mod  // The offsetParent's scroll position, not if the element is fixed
        + (this.cssPosition == "fixed" ? $(document).scrollLeft() : 0) * mod
        + this.margins.left * mod                       //Add the margin (you don't want the margin counting in intersection methods)
      )
    };
  },
  generatePosition: function(e) {
    
    var o = this.options;
    var position = {
      top: (
        e.pageY                                 // The absolute mouse position
        - this.offset.click.top                         // Click offset (relative to the element)
        - this.offset.relative.top                        // Only for relative positioned nodes: Relative offset from element to offset parent
        - this.offset.parent.top                        // The offsetParent's offset without borders (offset + border)
        + (this.cssPosition == "fixed" || (this.cssPosition == "absolute" && this.offsetParent[0] == document.body) ? 0 : this.offsetParent[0].scrollTop) // The offsetParent's scroll position, not if the element is fixed
        - (this.cssPosition == "fixed" ? $(document).scrollTop() : 0)
      ),
      left: (
        e.pageX                                 // The absolute mouse position
        - this.offset.click.left                        // Click offset (relative to the element)
        - this.offset.relative.left                       // Only for relative positioned nodes: Relative offset from element to offset parent
        - this.offset.parent.left                       // The offsetParent's offset without borders (offset + border)
        + (this.cssPosition == "fixed" || (this.cssPosition == "absolute" && this.offsetParent[0] == document.body) ? 0 : this.offsetParent[0].scrollLeft)  // The offsetParent's scroll position, not if the element is fixed
        - (this.cssPosition == "fixed" ? $(document).scrollLeft() : 0)
      )
    };
    
    if(!this.originalPosition) return position;                   //If we are not dragging yet, we won't check for options
    
    /*
     * - Position constraining -
     * Constrain the position to a mix of grid, containment.
     */
    if(this.containment) {
      if(position.left < this.containment[0]) position.left = this.containment[0];
      if(position.top < this.containment[1]) position.top = this.containment[1];
      if(position.left > this.containment[2]) position.left = this.containment[2];
      if(position.top > this.containment[3]) position.top = this.containment[3];
    }
    
    if(o.grid) {
      var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1];
      position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
      
      var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0];
      position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
    }
    
    return position;
  },
  mouseDrag: function(e) {
    
    //Compute the helpers position
    this.position = this.generatePosition(e);
    this.positionAbs = this.convertPositionTo("absolute");
    
    //Call plugins and callbacks and use the resulting position if something is returned    
    this.position = this.propagate("drag", e) || this.position;
    
    if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
    if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
    if($.ui.ddmanager) $.ui.ddmanager.drag(this, e);
    
    return false;
  },
  mouseStop: function(e) {
    
    //If we are using droppables, inform the manager about the drop
    if ($.ui.ddmanager && !this.options.dropBehaviour)
      $.ui.ddmanager.drop(this, e);
      
    if(this.options.revert) {
      var self = this;
      $(this.helper).animate(this.originalPosition, parseInt(this.options.revert, 10) || 500, function() {
        self.propagate("stop", e);
        self.clear();
      });
    } else {
      this.propagate("stop", e);
      this.clear();
    }
    
    return false;
  },
  clear: function() {
    this.helper.removeClass("ui-draggable-dragging");
    if(this.options.helper != 'original' && !this.cancelHelperRemoval) this.helper.remove();
    //if($.ui.ddmanager) $.ui.ddmanager.current = null;
    this.helper = null;
    this.cancelHelperRemoval = false;
  },
  
  // From now on bulk stuff - mainly helpers
  plugins: {},
  uiHash: function(e) {
    return {
      helper: this.helper,
      position: this.position,
      absolutePosition: this.positionAbs,
      options: this.options     
    };
  },
  propagate: function(n,e) {
    $.ui.plugin.call(this, n, [e, this.uiHash()]);
    return this.element.triggerHandler(n == "drag" ? n : "drag"+n, [e, this.uiHash()], this.options[n]);
  },
  destroy: function() {
    if(!this.element.data('draggable')) return;
    this.element.removeData("draggable").unbind(".draggable").removeClass('ui-draggable');
    this.mouseDestroy();
  }
}));

$.extend($.ui.draggable, {
  defaults: {
    appendTo: "parent",
    axis: false,
    cancel: ":input",
    delay: 0,
    distance: 1,
    helper: "original"
  }
});

$.ui.plugin.add("draggable", "cursor", {
  start: function(e, ui) {
    var t = $('body');
    if (t.css("cursor")) ui.options._cursor = t.css("cursor");
    t.css("cursor", ui.options.cursor);
  },
  stop: function(e, ui) {
    if (ui.options._cursor) $('body').css("cursor", ui.options._cursor);
  }
});

$.ui.plugin.add("draggable", "zIndex", {
  start: function(e, ui) {
    var t = $(ui.helper);
    if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex");
    t.css('zIndex', ui.options.zIndex);
  },
  stop: function(e, ui) {
    if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex);
  }
});

$.ui.plugin.add("draggable", "opacity", {
  start: function(e, ui) {
    var t = $(ui.helper);
    if(t.css("opacity")) ui.options._opacity = t.css("opacity");
    t.css('opacity', ui.options.opacity);
  },
  stop: function(e, ui) {
    if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity);
  }
});

$.ui.plugin.add("draggable", "iframeFix", {
  start: function(e, ui) {
    $(ui.options.iframeFix === true ? "iframe" : ui.options.iframeFix).each(function() {          
      $('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
      .css({
        width: this.offsetWidth+"px", height: this.offsetHeight+"px",
        position: "absolute", opacity: "0.001", zIndex: 1000
      })
      .css($(this).offset())
      .appendTo("body");
    });
  },
  stop: function(e, ui) {
    $("div.DragDropIframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers  
  }
});

$.ui.plugin.add("draggable", "scroll", {
  start: function(e, ui) {
    var o = ui.options;
    var i = $(this).data("draggable");
    o.scrollSensitivity = o.scrollSensitivity || 20;
    o.scrollSpeed   = o.scrollSpeed || 20;
    
    i.overflowY = function(el) {
      do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-y'))) return el; el = el.parent(); } while (el[0].parentNode);
      return $(document);
    }(this);
    i.overflowX = function(el) {
      do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-x'))) return el; el = el.parent(); } while (el[0].parentNode);
      return $(document);
    }(this);
    
    if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') i.overflowYOffset = i.overflowY.offset();
    if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') i.overflowXOffset = i.overflowX.offset();
    
  },
  drag: function(e, ui) {
    
    var o = ui.options;
    var i = $(this).data("draggable");
    
    if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') {
      if((i.overflowYOffset.top + i.overflowY[0].offsetHeight) - e.pageY < o.scrollSensitivity)
        i.overflowY[0].scrollTop = i.overflowY[0].scrollTop + o.scrollSpeed;
      if(e.pageY - i.overflowYOffset.top < o.scrollSensitivity)
        i.overflowY[0].scrollTop = i.overflowY[0].scrollTop - o.scrollSpeed;
              
    } else {
      if(e.pageY - $(document).scrollTop() < o.scrollSensitivity)
        $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
      if($(window).height() - (e.pageY - $(document).scrollTop()) < o.scrollSensitivity)
        $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
    }
    
    if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') {
      if((i.overflowXOffset.left + i.overflowX[0].offsetWidth) - e.pageX < o.scrollSensitivity)
        i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft + o.scrollSpeed;
      if(e.pageX - i.overflowXOffset.left < o.scrollSensitivity)
        i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft - o.scrollSpeed;
    } else {
      if(e.pageX - $(document).scrollLeft() < o.scrollSensitivity)
        $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
      if($(window).width() - (e.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
        $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
    }
    
  }
});

$.ui.plugin.add("draggable", "snap", {
  start: function(e, ui) {
    
    var inst = $(this).data("draggable");
    inst.snapElements = [];
    $(ui.options.snap === true ? '.ui-draggable' : ui.options.snap).each(function() {
      var $t = $(this); var $o = $t.offset();
      if(this != inst.element[0]) inst.snapElements.push({
        item: this,
        width: $t.outerWidth(), height: $t.outerHeight(),
        top: $o.top, left: $o.left
      });
    });
    
  },
  drag: function(e, ui) {
    
    var inst = $(this).data("draggable");
    var d = ui.options.snapTolerance || 20;
    var x1 = ui.absolutePosition.left, x2 = x1 + inst.helperProportions.width,
      y1 = ui.absolutePosition.top, y2 = y1 + inst.helperProportions.height;
    
    for (var i = inst.snapElements.length - 1; i >= 0; i--){
      
      var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width, 
        t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;
      
      //Yes, I know, this is insane ;)
      if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) continue;
      
      if(ui.options.snapMode != 'inner') {
        var ts = Math.abs(t - y2) <= 20;
        var bs = Math.abs(b - y1) <= 20;
        var ls = Math.abs(l - x2) <= 20;
        var rs = Math.abs(r - x1) <= 20;
        if(ts) ui.position.top = inst.convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top;
        if(bs) ui.position.top = inst.convertPositionTo("relative", { top: b, left: 0 }).top;
        if(ls) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left;
        if(rs) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: r }).left;
      }
      
      if(ui.options.snapMode != 'outer') {
        var ts = Math.abs(t - y1) <= 20;
        var bs = Math.abs(b - y2) <= 20;
        var ls = Math.abs(l - x1) <= 20;
        var rs = Math.abs(r - x2) <= 20;
        if(ts) ui.position.top = inst.convertPositionTo("relative", { top: t, left: 0 }).top;
        if(bs) ui.position.top = inst.convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top;
        if(ls) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: l }).left;
        if(rs) ui.position.left = inst.convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left;
      }
      
    };
  }
});

$.ui.plugin.add("draggable", "connectToSortable", {
  start: function(e,ui) {
  
    var inst = $(this).data("draggable");
    inst.sortables = [];
    $(ui.options.connectToSortable).each(function() {
      if($.data(this, 'sortable')) {
        var sortable = $.data(this, 'sortable');
        inst.sortables.push({
          instance: sortable,
          shouldRevert: sortable.options.revert
        });
        sortable.refreshItems();  //Do a one-time refresh at start to refresh the containerCache  
        sortable.propagate("activate", e, inst);
      }
    });

  },
  stop: function(e,ui) {
    
    //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
    var inst = $(this).data("draggable");
    
    $.each(inst.sortables, function() {
      if(this.instance.isOver) {
        this.instance.isOver = 0;
        inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
        this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)
        if(this.shouldRevert) this.instance.options.revert = true; //revert here
        this.instance.mouseStop(e);
        
        //Also propagate receive event, since the sortable is actually receiving a element
        this.instance.element.triggerHandler("sortreceive", [e, $.extend(this.instance.ui(), { sender: inst.element })], this.instance.options["receive"]);

        this.instance.options.helper = this.instance.options._helper;
      } else {
        this.instance.propagate("deactivate", e, inst);
      }

    });
    
  },
  drag: function(e,ui) {

    var inst = $(this).data("draggable"), self = this;
    
    var checkPos = function(o) {
        
      var l = o.left, r = l + o.width,
        t = o.top, b = t + o.height;

      return (l < (this.positionAbs.left + this.offset.click.left) && (this.positionAbs.left + this.offset.click.left) < r
          && t < (this.positionAbs.top + this.offset.click.top) && (this.positionAbs.top + this.offset.click.top) < b);       
    };
    
    $.each(inst.sortables, function(i) {

      if(checkPos.call(inst, this.instance.containerCache)) {

        //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
        if(!this.instance.isOver) {
          this.instance.isOver = 1;

          //Now we fake the start of dragging for the sortable instance,
          //by cloning the list group item, appending it to the sortable and using it as inst.currentItem
          //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
          this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true);
          this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
          this.instance.options.helper = function() { return ui.helper[0]; };
        
          e.target = this.instance.currentItem[0];
          this.instance.mouseCapture(e, true);
          this.instance.mouseStart(e, true, true);

          //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
          this.instance.offset.click.top = inst.offset.click.top;
          this.instance.offset.click.left = inst.offset.click.left;
          this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
          this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;
          
          inst.propagate("toSortable", e);
        
        }
        
        //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
        if(this.instance.currentItem) this.instance.mouseDrag(e);
        
      } else {
        
        //If it doesn't intersect with the sortable, and it intersected before,
        //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
        if(this.instance.isOver) {
          this.instance.isOver = 0;
          this.instance.cancelHelperRemoval = true;
          this.instance.options.revert = false; //No revert here
          this.instance.mouseStop(e, true);
          this.instance.options.helper = this.instance.options._helper;
          
          //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
          this.instance.currentItem.remove();
          if(this.instance.placeholder) this.instance.placeholder.remove();
          
          inst.propagate("fromSortable", e);
        }
        
      };

    });

  }
});

$.ui.plugin.add("draggable", "stack", {
  start: function(e,ui) {
    var group = $.makeArray($(ui.options.stack.group)).sort(function(a,b) {
      return (parseInt($(a).css("zIndex"),10) || ui.options.stack.min) - (parseInt($(b).css("zIndex"),10) || ui.options.stack.min);
    });
    
    $(group).each(function(i) {
      this.style.zIndex = ui.options.stack.min + i;
    });
    
    this[0].style.zIndex = ui.options.stack.min + group.length;
  }
});

})(jQuery);