ui.draggable.js(原版,未做改动)

/*
* 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) $.ui.ddmanager.drag(this, e);
        return false;
    },
    mouseStop: function(e) {
        //If we are using droppables, inform the manager about the drop
        var dropped = false;
        if ($.ui.ddmanager && !this.options.dropBehaviour)
            var dropped = $.ui.ddmanager.drop(this, e);       
        if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true) {
            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()]);
        if(n == "drag") this.positionAbs = this.convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins
        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);

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