(function() {

var Event=YAHOO.util.Event; 
var Dom=YAHOO.util.Dom;
YAHOO.util.DragDrop = function(id, sGroup, config) {
    if (id) {
        this.init(id, sGroup, config); 
    }
};

YAHOO.util.DragDrop.prototype = {
    id: null,
    config: null,
    dragElId: null, 
    handleElId: null, 
    invalidHandleTypes: null, 
    invalidHandleIds: null, 
    invalidHandleClasses: null, 
    startPageX: 0,
    startPageY: 0,
    groups: null,
    locked: false,
    lock: function() { this.locked = true; },
    unlock: function() { this.locked = false; },
    isTarget: true,
    padding: null,
    _domRef: null,
    __ygDragDrop: true,
    constrainX: false,
    constrainY: false,
    minX: 0,
    maxX: 0,
    minY: 0,
    maxY: 0,
    maintainOffset: false,
    xTicks: null,
    yTicks: null,
    primaryButtonOnly: true,
    available: false,
    hasOuterHandles: false,
    b4StartDrag: function(x, y) { },
    startDrag: function(x, y) { /* override this */ },
    b4Drag: function(e) { },
    onDrag: function(e) { /* override this */ },
    onDragEnter: function(e, id) { /* override this */ },
    b4DragOver: function(e) { },
    onDragOver: function(e, id) { /* override this */ },
    b4DragOut: function(e) { },
    onDragOut: function(e, id) { /* override this */ },
    b4DragDrop: function(e) { },
    onDragDrop: function(e, id) { /* override this */ },
    onInvalidDrop: function(e) { /* override this */ },
    b4EndDrag: function(e) { },
    endDrag: function(e) { /* override this */ },
    b4MouseDown: function(e) {  },
    onMouseDown: function(e) { /* override this */ },
    onMouseUp: function(e) { /* override this */ },
    onAvailable: function () { 
    },
    getEl: function() { 
        if (!this._domRef) {
            this._domRef = Dom.get(this.id); 
        }

        return this._domRef;
    },
    getDragEl: function() {
        return Dom.get(this.dragElId);
    },
    init: function(id, sGroup, config) {
        this.initTarget(id, sGroup, config);
        Event.on(this.id, "mousedown", this.handleMouseDown, this, true);
        // Event.on(this.id, "selectstart", Event.preventDefault);
    },
    initTarget: function(id, sGroup, config) {
        this.config = config || {};
        this.DDM = YAHOO.util.DDM;
        this.groups = {};
        if (typeof id !== "string") {
            YAHOO.log("id is not a string, assuming it is an HTMLElement");
            id = Dom.generateId(id);
        }
        this.id = id;
        this.addToGroup((sGroup) ? sGroup : "default");
        this.handleElId = id;
        Event.onAvailable(id, this.handleOnAvailable, this, true);
        this.setDragElId(id); 
        this.invalidHandleTypes = { A: "A" };
        this.invalidHandleIds = {};
        this.invalidHandleClasses = [];
        this.applyConfig();
    },
    applyConfig: function() {
        this.padding           = this.config.padding || [0, 0, 0, 0];
        this.isTarget          = (this.config.isTarget !== false);
        this.maintainOffset    = (this.config.maintainOffset);
        this.primaryButtonOnly = (this.config.primaryButtonOnly !== false);

    },
    handleOnAvailable: function() {
        this.available = true;
        this.resetConstraints();
        this.onAvailable();
    },
    setPadding: function(iTop, iRight, iBot, iLeft) {
        if (!iRight && 0 !== iRight) {
            this.padding = [iTop, iTop, iTop, iTop];
        } else if (!iBot && 0 !== iBot) {
            this.padding = [iTop, iRight, iTop, iRight];
        } else {
            this.padding = [iTop, iRight, iBot, iLeft];
        }
    },
    setInitPosition: function(diffX, diffY) {
        var el = this.getEl();
        if (!this.DDM.verifyEl(el)) {
            return;
        }
        var dx = diffX || 0;
        var dy = diffY || 0;
        var p = Dom.getXY( el );
        this.initPageX = p[0] - dx;
        this.initPageY = p[1] - dy;
        this.lastPageX = p[0];
        this.lastPageY = p[1];
        this.setStartPosition(p);
    },
    setStartPosition: function(pos) {
        var p = pos || Dom.getXY( this.getEl() );
        this.deltaSetXY = null;
        this.startPageX = p[0];
        this.startPageY = p[1];
    },
    addToGroup: function(sGroup) {
        this.groups[sGroup] = true;
        this.DDM.regDragDrop(this, sGroup);
    },
    removeFromGroup: function(sGroup) {
        if (this.groups[sGroup]) {
            delete this.groups[sGroup];
        }
        this.DDM.removeDDFromGroup(this, sGroup);
    },
    setDragElId: function(id) {
        this.dragElId = id;
    },
    setHandleElId: function(id) {
        if (typeof id !== "string") {
            YAHOO.log("id is not a string, assuming it is an HTMLElement");
            id = Dom.generateId(id);
        }
        this.handleElId = id;
        this.DDM.regHandle(this.id, id);
    },
    setOuterHandleElId: function(id) {
        if (typeof id !== "string") {
            YAHOO.log("id is not a string, assuming it is an HTMLElement");
            id = Dom.generateId(id);
        }
        Event.on(id, "mousedown", 
                this.handleMouseDown, this, true);
        this.setHandleElId(id);

        this.hasOuterHandles = true;
    },
    unreg: function() {
        Event.removeListener(this.id, "mousedown", 
                this.handleMouseDown);
        this._domRef = null;
        this.DDM._remove(this);
    },
    isLocked: function() {
        return (this.DDM.isLocked() || this.locked);
    },
    handleMouseDown: function(e, oDD) {
        var button = e.which || e.button;
        if (this.primaryButtonOnly && button > 1) {
            return;
        }
        if (this.isLocked()) {
            return;
        }
        this.DDM.refreshCache(this.groups);
        var pt = new YAHOO.util.Point(Event.getPageX(e), Event.getPageY(e));
        if (!this.hasOuterHandles && !this.DDM.isOverTarget(pt, this) )  {
        } else {
            if (this.clickValidator(e)) {
                this.setStartPosition();
                this.b4MouseDown(e);
                this.onMouseDown(e);
                this.DDM.handleMouseDown(e, this);
                this.DDM.stopEvent(e);
            } else {
            }
        }
    },
    clickValidator: function(e) {
        var target = Event.getTarget(e);
        return ( this.isValidHandleChild(target) &&
                    (this.id == this.handleElId || 
                        this.DDM.handleWasClicked(target, this.id)) );
    },
    addInvalidHandleType: function(tagName) {
        var type = tagName.toUpperCase();
        this.invalidHandleTypes[type] = type;
    },
    addInvalidHandleId: function(id) {
        if (typeof id !== "string") {
            YAHOO.log("id is not a string, assuming it is an HTMLElement");
            id = Dom.generateId(id);
        }
        this.invalidHandleIds[id] = id;
    },
    addInvalidHandleClass: function(cssClass) {
        this.invalidHandleClasses.push(cssClass);
    },
    removeInvalidHandleType: function(tagName) {
        var type = tagName.toUpperCase();
        // this.invalidHandleTypes[type] = null;
        delete this.invalidHandleTypes[type];
    },
    removeInvalidHandleId: function(id) {
        if (typeof id !== "string") {
            YAHOO.log("id is not a string, assuming it is an HTMLElement");
            id = Dom.generateId(id);
        }
        delete this.invalidHandleIds[id];
    },
    removeInvalidHandleClass: function(cssClass) {
        for (var i=0, len=this.invalidHandleClasses.length; i<len; ++i) {
            if (this.invalidHandleClasses[i] == cssClass) {
                delete this.invalidHandleClasses[i];
            }
        }
    },
    isValidHandleChild: function(node) {

        var valid = true;
        var nodeName;
        try {
            nodeName = node.nodeName.toUpperCase();
        } catch(e) {
            nodeName = node.nodeName;
        }
        valid = valid && !this.invalidHandleTypes[nodeName];
        valid = valid && !this.invalidHandleIds[node.id];

        for (var i=0, len=this.invalidHandleClasses.length; valid && i<len; ++i) {
            valid = !Dom.hasClass(node, this.invalidHandleClasses[i]);
        }


        return valid;

    },
    setXTicks: function(iStartX, iTickSize) {
        this.xTicks = [];
        this.xTickSize = iTickSize;
        
        var tickMap = {};

        for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
            if (!tickMap[i]) {
                this.xTicks[this.xTicks.length] = i;
                tickMap[i] = true;
            }
        }

        for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
            if (!tickMap[i]) {
                this.xTicks[this.xTicks.length] = i;
                tickMap[i] = true;
            }
        }

        this.xTicks.sort(this.DDM.numericSort) ;
    },
    setYTicks: function(iStartY, iTickSize) {
        this.yTicks = [];
        this.yTickSize = iTickSize;

        var tickMap = {};

        for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
            if (!tickMap[i]) {
                this.yTicks[this.yTicks.length] = i;
                tickMap[i] = true;
            }
        }

        for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
            if (!tickMap[i]) {
                this.yTicks[this.yTicks.length] = i;
                tickMap[i] = true;
            }
        }

        this.yTicks.sort(this.DDM.numericSort) ;
    },
    setXConstraint: function(iLeft, iRight, iTickSize) {
        this.leftConstraint = iLeft;
        this.rightConstraint = iRight;

        this.minX = this.initPageX - iLeft;
        this.maxX = this.initPageX + iRight;
        if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }

        this.constrainX = true;
    },
    clearConstraints: function() {
        this.constrainX = false;
        this.constrainY = false;
        this.clearTicks();
    },
    clearTicks: function() {
        this.xTicks = null;
        this.yTicks = null;
        this.xTickSize = 0;
        this.yTickSize = 0;
    },
    setYConstraint: function(iUp, iDown, iTickSize) {
        this.topConstraint = iUp;
        this.bottomConstraint = iDown;

        this.minY = this.initPageY - iUp;
        this.maxY = this.initPageY + iDown;
        if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }

        this.constrainY = true;
        
    },
    resetConstraints: function() {
        if (this.initPageX || this.initPageX === 0) {
            var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
            var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
            this.setInitPosition(dx, dy);
        } else {
            this.setInitPosition();
        }
        if (this.constrainX) {
            this.setXConstraint( this.leftConstraint, 
                                 this.rightConstraint, 
                                 this.xTickSize        );
        }

        if (this.constrainY) {
            this.setYConstraint( this.topConstraint, 
                                 this.bottomConstraint, 
                                 this.yTickSize         );
        }
    },
    getTick: function(val, tickArray) {

        if (!tickArray) {
            return val; 
        } else if (tickArray[0] >= val) {
            return tickArray[0];
        } else {
            for (var i=0, len=tickArray.length; i<len; ++i) {
                var next = i + 1;
                if (tickArray[next] && tickArray[next] >= val) {
                    var diff1 = val - tickArray[i];
                    var diff2 = tickArray[next] - val;
                    return (diff2 > diff1) ? tickArray[i] : tickArray[next];
                }
            }
            return tickArray[tickArray.length - 1];
        }
    },
    toString: function() {
        return ("DragDrop " + this.id);
    }

};

})();
if (!YAHOO.util.DragDropMgr) {
YAHOO.util.DragDropMgr = function() {

    var Event = YAHOO.util.Event;

    return {
        ids: {},
        handleIds: {},
        dragCurrent: null,
        dragOvers: {},
        deltaX: 0,
        deltaY: 0,
        preventDefault: true,
        stopPropagation: true,
        initalized: false,
        locked: false,
        init: function() {
            this.initialized = true;
        },
        POINT: 0,
        INTERSECT: 1,
        STRICT_INTERSECT: 2,
        mode: 0,
        _execOnAll: function(sMethod, args) {
            for (var i in this.ids) {
                for (var j in this.ids[i]) {
                    var oDD = this.ids[i][j];
                    if (! this.isTypeOfDD(oDD)) {
                        continue;
                    }
                    oDD[sMethod].apply(oDD, args);
                }
            }
        },
        _onLoad: function() {

            this.init();
            Event.on(document, "mouseup",   this.handleMouseUp, this, true);
            Event.on(document, "mousemove", this.handleMouseMove, this, true);
            Event.on(window,   "unload",    this._onUnload, this, true);
            Event.on(window,   "resize",    this._onResize, this, true);
        },
        _onResize: function(e) {
            this._execOnAll("resetConstraints", []);
        },
        lock: function() { this.locked = true; },
        unlock: function() { this.locked = false; },
        isLocked: function() { return this.locked; },
        locationCache: {},
        useCache: true,
        clickPixelThresh: 3,
        clickTimeThresh: 1000,
        dragThreshMet: false,
        clickTimeout: null,
        startX: 0,
        startY: 0,
        regDragDrop: function(oDD, sGroup) {
            if (!this.initialized) { this.init(); }
            
            if (!this.ids[sGroup]) {
                this.ids[sGroup] = {};
            }
            this.ids[sGroup][oDD.id] = oDD;
        },
        removeDDFromGroup: function(oDD, sGroup) {
            if (!this.ids[sGroup]) {
                this.ids[sGroup] = {};
            }

            var obj = this.ids[sGroup];
            if (obj && obj[oDD.id]) {
                delete obj[oDD.id];
            }
        },
        _remove: function(oDD) {
            for (var g in oDD.groups) {
                if (g && this.ids[g][oDD.id]) {
                    delete this.ids[g][oDD.id];
                }
            }
            delete this.handleIds[oDD.id];
        },
        regHandle: function(sDDId, sHandleId) {
            if (!this.handleIds[sDDId]) {
                this.handleIds[sDDId] = {};
            }
            this.handleIds[sDDId][sHandleId] = sHandleId;
        },
        isDragDrop: function(id) {
            return ( this.getDDById(id) ) ? true : false;
        },
        getRelated: function(p_oDD, bTargetsOnly) {
            var oDDs = [];
            for (var i in p_oDD.groups) {
                for (j in this.ids[i]) {
                    var dd = this.ids[i][j];
                    if (! this.isTypeOfDD(dd)) {
                        continue;
                    }
                    if (!bTargetsOnly || dd.isTarget) {
                        oDDs[oDDs.length] = dd;
                    }
                }
            }

            return oDDs;
        },
        isLegalTarget: function (oDD, oTargetDD) {
            var targets = this.getRelated(oDD, true);
            for (var i=0, len=targets.length;i<len;++i) {
                if (targets[i].id == oTargetDD.id) {
                    return true;
                }
            }

            return false;
        },
        isTypeOfDD: function (oDD) {
            return (oDD && oDD.__ygDragDrop);
        },
        isHandle: function(sDDId, sHandleId) {
            return ( this.handleIds[sDDId] && 
                            this.handleIds[sDDId][sHandleId] );
        },
        getDDById: function(id) {
            for (var i in this.ids) {
                if (this.ids[i][id]) {
                    return this.ids[i][id];
                }
            }
            return null;
        },
        handleMouseDown: function(e, oDD) {

            this.currentTarget = YAHOO.util.Event.getTarget(e);

            this.dragCurrent = oDD;

            var el = oDD.getEl();
            this.startX = YAHOO.util.Event.getPageX(e);
            this.startY = YAHOO.util.Event.getPageY(e);

            this.deltaX = this.startX - el.offsetLeft;
            this.deltaY = this.startY - el.offsetTop;
            this.dragThreshMet = false;
            this.clickTimeout = setTimeout( 
                    function() { 
                        var DDM = YAHOO.util.DDM;
                        DDM.startDrag(DDM.startX, DDM.startY); 
                    }, 
                    this.clickTimeThresh );
        },
        startDrag: function(x, y) {
            clearTimeout(this.clickTimeout);
            if (this.dragCurrent) {
                this.dragCurrent.b4StartDrag(x, y);
                this.dragCurrent.startDrag(x, y);
            }
            this.dragThreshMet = true;
        },
        handleMouseUp: function(e) {

            if (! this.dragCurrent) {
                return;
            }

            clearTimeout(this.clickTimeout);

            if (this.dragThreshMet) {
                this.fireEvents(e, true);
            } else {
            }
            this.stopDrag(e);
            this.stopEvent(e);
        },
        stopEvent: function(e) {
            if (this.stopPropagation) {
                YAHOO.util.Event.stopPropagation(e);
            }
            if (this.preventDefault) {
                YAHOO.util.Event.preventDefault(e);
            }
        },
        stopDrag: function(e) {
            if (this.dragCurrent) {
                if (this.dragThreshMet) {
                    this.dragCurrent.b4EndDrag(e);
                    this.dragCurrent.endDrag(e);
                }
                this.dragCurrent.onMouseUp(e);
            }
            this.dragCurrent = null;
            this.dragOvers = {};
        },
        handleMouseMove: function(e) {
            if (! this.dragCurrent) {
                return true;
            }
            if (YAHOO.util.Event.isIE && !e.button) {
                this.stopEvent(e);
                return this.handleMouseUp(e);
            }
            if (!this.dragThreshMet) {
                var diffX = Math.abs(this.startX - YAHOO.util.Event.getPageX(e));
                var diffY = Math.abs(this.startY - YAHOO.util.Event.getPageY(e));
                if (diffX > this.clickPixelThresh || 
                            diffY > this.clickPixelThresh) {
                    this.startDrag(this.startX, this.startY);
                }
            }

            if (this.dragThreshMet) {
                this.dragCurrent.b4Drag(e);
                this.dragCurrent.onDrag(e);
                this.fireEvents(e, false);
            }

            this.stopEvent(e);

            return true;
        },
        fireEvents: function(e, isDrop) {
            var dc = this.dragCurrent;
            if (!dc || dc.isLocked()) {
                return;
            }
            var x = YAHOO.util.Event.getPageX(e);
            var y = YAHOO.util.Event.getPageY(e);
            var pt = new YAHOO.util.Point(x,y);
            var oldOvers = [];
            var outEvts   = [];
            var overEvts  = [];
            var dropEvts  = [];
            var enterEvts = [];
            for (var i in this.dragOvers) {
                var ddo = this.dragOvers[i];
                if (! this.isTypeOfDD(ddo)) {
                    continue;
                }
                if (! this.isOverTarget(pt, ddo, this.mode)) {
                    outEvts.push( ddo );
                }
                oldOvers[i] = true;
                delete this.dragOvers[i];
            }

            for (var sGroup in dc.groups) {
                
                if ("string" != typeof sGroup) {
                    continue;
                }

                for (i in this.ids[sGroup]) {
                    var oDD = this.ids[sGroup][i];
                    if (! this.isTypeOfDD(oDD)) {
                        continue;
                    }

                    if (oDD.isTarget && !oDD.isLocked() && oDD != dc) {
                        if (this.isOverTarget(pt, oDD, this.mode)) {
                            if (isDrop) {
                                dropEvts.push( oDD );
                            } else {
                                if (!oldOvers[oDD.id]) {
                                    enterEvts.push( oDD );
                                } else {
                                    overEvts.push( oDD );
                                }

                                this.dragOvers[oDD.id] = oDD;
                            }
                        }
                    }
                }
            }

            if (this.mode) {
                if (outEvts.length) {
                    dc.b4DragOut(e, outEvts);
                    dc.onDragOut(e, outEvts);
                }

                if (enterEvts.length) {
                    dc.onDragEnter(e, enterEvts);
                }

                if (overEvts.length) {
                    dc.b4DragOver(e, overEvts);
                    dc.onDragOver(e, overEvts);
                }

                if (dropEvts.length) {
                    dc.b4DragDrop(e, dropEvts);
                    dc.onDragDrop(e, dropEvts);
                }

            } else {
                var len = 0;
                for (i=0, len=outEvts.length; i<len; ++i) {
                    dc.b4DragOut(e, outEvts[i].id);
                    dc.onDragOut(e, outEvts[i].id);
                }
                for (i=0,len=enterEvts.length; i<len; ++i) {
                    dc.onDragEnter(e, enterEvts[i].id);
                }
                for (i=0,len=overEvts.length; i<len; ++i) {
                    dc.b4DragOver(e, overEvts[i].id);
                    dc.onDragOver(e, overEvts[i].id);
                }
                for (i=0, len=dropEvts.length; i<len; ++i) {
                    dc.b4DragDrop(e, dropEvts[i].id);
                    dc.onDragDrop(e, dropEvts[i].id);
                }

            }
            if (isDrop && !dropEvts.length) {
                dc.onInvalidDrop(e);
            }

        },
        getBestMatch: function(dds) {
            var winner = null;

            var len = dds.length;

            if (len == 1) {
                winner = dds[0];
            } else {
                for (var i=0; i<len; ++i) {
                    var dd = dds[i];
                    if (this.mode == this.INTERSECT && dd.cursorIsOver) {
                        winner = dd;
                        break;
                    } else {
                        if (!winner || !winner.overlap || (dd.overlap &&
                            winner.overlap.getArea() < dd.overlap.getArea())) {
                            winner = dd;
                        }
                    }
                }
            }

            return winner;
        },

        refreshCache: function(groups) {
            for (var sGroup in groups) {
                if ("string" != typeof sGroup) {
                    continue;
                }
                for (var i in this.ids[sGroup]) {
                    var oDD = this.ids[sGroup][i];

                    if (this.isTypeOfDD(oDD)) {
                    // if (this.isTypeOfDD(oDD) && oDD.isTarget) {
                        var loc = this.getLocation(oDD);
                        if (loc) {
                            this.locationCache[oDD.id] = loc;
                        } else {
                            delete this.locationCache[oDD.id];
                            // this will unregister the drag and drop object if
                            // the element is not in a usable state
                            // oDD.unreg();
                        }
                    }
                }
            }
        },
        verifyEl: function(el) {
            try {
                if (el) {
                    var parent = el.offsetParent;
                    if (parent) {
                        return true;
                    }
                }
            } catch(e) {
            }

            return false;
        },
        getLocation: function(oDD) {
            if (! this.isTypeOfDD(oDD)) {
                return null;
            }

            var el = oDD.getEl(), pos, x1, x2, y1, y2, t, r, b, l;

            try {
                pos= YAHOO.util.Dom.getXY(el);
            } catch (e) { }

            if (!pos) {
                return null;
            }

            x1 = pos[0];
            x2 = x1 + el.offsetWidth;
            y1 = pos[1];
            y2 = y1 + el.offsetHeight;

            t = y1 - oDD.padding[0];
            r = x2 + oDD.padding[1];
            b = y2 + oDD.padding[2];
            l = x1 - oDD.padding[3];

            return new YAHOO.util.Region( t, r, b, l );
        },
        isOverTarget: function(pt, oTarget, intersect) {
            var loc = this.locationCache[oTarget.id];
            if (!loc || !this.useCache) {
                loc = this.getLocation(oTarget);
                this.locationCache[oTarget.id] = loc;

            }

            if (!loc) {
                return false;
            }

            oTarget.cursorIsOver = loc.contains( pt );
            var dc = this.dragCurrent;
            if (!dc || !dc.getTargetCoord || 
                    (!intersect && !dc.constrainX && !dc.constrainY)) {
                return oTarget.cursorIsOver;
            }

            oTarget.overlap = null;
            var pos = dc.getTargetCoord(pt.x, pt.y);
            var el = dc.getDragEl();
            var curRegion = new YAHOO.util.Region( pos.y, 
                                                   pos.x + el.offsetWidth,
                                                   pos.y + el.offsetHeight, 
                                                   pos.x );

            var overlap = curRegion.intersect(loc);

            if (overlap) {
                oTarget.overlap = overlap;
                return (intersect) ? true : oTarget.cursorIsOver;
            } else {
                return false;
            }
        },
        _onUnload: function(e, me) {
            this.unregAll();
        },
        unregAll: function() {
            if (this.dragCurrent) {
                this.stopDrag();
                this.dragCurrent = null;
            }
            this._execOnAll("unreg", []);

            for (i in this.elementCache) {
                delete this.elementCache[i];
            }
            this.elementCache = {};
            this.ids = {};
        },
        elementCache: {},
        getElWrapper: function(id) {
            var oWrapper = this.elementCache[id];
            if (!oWrapper || !oWrapper.el) {
                oWrapper = this.elementCache[id] = 
                    new this.ElementWrapper(YAHOO.util.Dom.get(id));
            }
            return oWrapper;
        },
        getElement: function(id) {
            return YAHOO.util.Dom.get(id);
        },
        getCss: function(id) {
            var el = YAHOO.util.Dom.get(id);
            return (el) ? el.style : null;
        },
        ElementWrapper: function(el) {
                this.el = el || null;
                this.id = this.el && el.id;
                this.css = this.el && el.style;
            },
        getPosX: function(el) {
            return YAHOO.util.Dom.getX(el);
        },
        getPosY: function(el) {
            return YAHOO.util.Dom.getY(el); 
        },
        swapNode: function(n1, n2) {
            if (n1.swapNode) {
                n1.swapNode(n2);
            } else {
                var p = n2.parentNode;
                var s = n2.nextSibling;

                if (s == n1) {
                    p.insertBefore(n1, n2);
                } else if (n2 == n1.nextSibling) {
                    p.insertBefore(n2, n1);
                } else {
                    n1.parentNode.replaceChild(n2, n1);
                    p.insertBefore(n1, s);
                }
            }
        },
        getScroll: function () {
            var t, l, dde=document.documentElement, db=document.body;
            if (dde && (dde.scrollTop || dde.scrollLeft)) {
                t = dde.scrollTop;
                l = dde.scrollLeft;
            } else if (db) {
                t = db.scrollTop;
                l = db.scrollLeft;
            } else {
                YAHOO.log("could not get scroll property");
            }
            return { top: t, left: l };
        },
        getStyle: function(el, styleProp) {
            return YAHOO.util.Dom.getStyle(el, styleProp);
        },
        getScrollTop: function () { return this.getScroll().top; },
        getScrollLeft: function () { return this.getScroll().left; },
        moveToEl: function (moveEl, targetEl) {
            var aCoord = YAHOO.util.Dom.getXY(targetEl);
            YAHOO.util.Dom.setXY(moveEl, aCoord);
        },
        getClientHeight: function() {
            return YAHOO.util.Dom.getViewportHeight();
        },
        getClientWidth: function() {
            return YAHOO.util.Dom.getViewportWidth();
        },
        numericSort: function(a, b) { return (a - b); },
        _timeoutCount: 0,
        _addListeners: function() {
            var DDM = YAHOO.util.DDM;
            if ( YAHOO.util.Event && document ) {
                DDM._onLoad();
            } else {
                if (DDM._timeoutCount > 2000) {
                } else {
                    setTimeout(DDM._addListeners, 10);
                    if (document && document.body) {
                        DDM._timeoutCount += 1;
                    }
                }
            }
        },

        handleWasClicked: function(node, id) {
            if (this.isHandle(id, node.id)) {
                return true;
            } else {
                var p = node.parentNode;

                while (p) {
                    if (this.isHandle(id, p.id)) {
                        return true;
                    } else {
                        p = p.parentNode;
                    }
                }
            }

            return false;
        }

    };

}();
YAHOO.util.DDM = YAHOO.util.DragDropMgr;
YAHOO.util.DDM._addListeners();

}
YAHOO.util.DD = function(id, sGroup, config) {
    if (id) {
        this.init(id, sGroup, config);
    }
};

YAHOO.extend(YAHOO.util.DD, YAHOO.util.DragDrop, {
    scroll: true, 
    autoOffset: function(iPageX, iPageY) {
        var x = iPageX - this.startPageX;
        var y = iPageY - this.startPageY;
        this.setDelta(x, y);
    },
    setDelta: function(iDeltaX, iDeltaY) {
        this.deltaX = iDeltaX;
        this.deltaY = iDeltaY;
    },
    setDragElPos: function(iPageX, iPageY) {
        var el = this.getDragEl();
        this.alignElWithMouse(el, iPageX, iPageY);
    },
    alignElWithMouse: function(el, iPageX, iPageY) {
        var oCoord = this.getTargetCoord(iPageX, iPageY);

        if (!this.deltaSetXY) {
            var aCoord = [oCoord.x, oCoord.y];
            YAHOO.util.Dom.setXY(el, aCoord);
            var newLeft = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
            var newTop  = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );

            this.deltaSetXY = [ newLeft - oCoord.x, newTop - oCoord.y ];
        } else {
            YAHOO.util.Dom.setStyle(el, "left", (oCoord.x + this.deltaSetXY[0]) + "px");
            YAHOO.util.Dom.setStyle(el, "top",  (oCoord.y + this.deltaSetXY[1]) + "px");
        }
        
        this.cachePosition(oCoord.x, oCoord.y);
        this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
    },
    cachePosition: function(iPageX, iPageY) {
        if (iPageX) {
            this.lastPageX = iPageX;
            this.lastPageY = iPageY;
        } else {
            var aCoord = YAHOO.util.Dom.getXY(this.getEl());
            this.lastPageX = aCoord[0];
            this.lastPageY = aCoord[1];
        }
    },
    autoScroll: function(x, y, h, w) {

        if (this.scroll) {
            var clientH = this.DDM.getClientHeight();
            var clientW = this.DDM.getClientWidth();
            var st = this.DDM.getScrollTop();
            var sl = this.DDM.getScrollLeft();
            var bot = h + y;
            var right = w + x;
            var toBot = (clientH + st - y - this.deltaY);
            var toRight = (clientW + sl - x - this.deltaX);
            var thresh = 40;
            var scrAmt = (document.all) ? 80 : 30;
            if ( bot > clientH && toBot < thresh ) { 
                window.scrollTo(sl, st + scrAmt); 
            }
            if ( y < st && st > 0 && y - st < thresh ) { 
                window.scrollTo(sl, st - scrAmt); 
            }
            if ( right > clientW && toRight < thresh ) { 
                window.scrollTo(sl + scrAmt, st); 
            }
            if ( x < sl && sl > 0 && x - sl < thresh ) { 
                window.scrollTo(sl - scrAmt, st);
            }
        }
    },
    getTargetCoord: function(iPageX, iPageY) {
        var x = iPageX - this.deltaX;
        var y = iPageY - this.deltaY;
        if (this.constrainX) {
            if (x < this.minX) { x = this.minX; }
            if (x > this.maxX) { x = this.maxX; }
        }

        if (this.constrainY) {
            if (y < this.minY) { y = this.minY; }
            if (y > this.maxY) { y = this.maxY; }
        }

        x = this.getTick(x, this.xTicks);
        y = this.getTick(y, this.yTicks);
        return {x:x, y:y};
    },
    applyConfig: function() {
        YAHOO.util.DD.superclass.applyConfig.call(this);
        this.scroll = (this.config.scroll !== false);
    },
    b4MouseDown: function(e) {
        this.autoOffset(YAHOO.util.Event.getPageX(e), 
                            YAHOO.util.Event.getPageY(e));
    },
    b4Drag: function(e) {
        this.setDragElPos(YAHOO.util.Event.getPageX(e), 
                            YAHOO.util.Event.getPageY(e));
    },
    toString: function() {
        return ("DD " + this.id);
    }
});
YAHOO.util.DDProxy = function(id, sGroup, config) {
    if (id) {
        this.init(id, sGroup, config);
        this.initFrame(); 
    }
};
YAHOO.util.DDProxy.dragElId = "ygddfdiv";
YAHOO.extend(YAHOO.util.DDProxy, YAHOO.util.DD, {
    resizeFrame: true,
    centerFrame: false,
    createFrame: function() {
        var self = this;
        var body = document.body;
        if (!body || !body.firstChild) {
            setTimeout( function() { self.createFrame(); }, 50 );
            return;
        }
        var div = this.getDragEl();
        if (!div) {
            div    = document.createElement("div");
            div.id = this.dragElId;
            var s  = div.style;
            s.position   = "absolute";
            s.visibility = "hidden";
            s.cursor     = "move";
            s.border     = "2px solid #aaa";
            s.zIndex     = 999;
            body.insertBefore(div, body.firstChild);
        }
    },
    initFrame: function() {
        this.createFrame();
    },
    applyConfig: function() {
        YAHOO.util.DDProxy.superclass.applyConfig.call(this);

        this.resizeFrame = (this.config.resizeFrame !== false);
        this.centerFrame = (this.config.centerFrame);
        this.setDragElId(this.config.dragElId || YAHOO.util.DDProxy.dragElId);
    },
    showFrame: function(iPageX, iPageY) {
        var el = this.getEl();
        var dragEl = this.getDragEl();
        var s = dragEl.style;

        this._resizeProxy();

        if (this.centerFrame) {
            this.setDelta( Math.round(parseInt(s.width,  10)/2), 
                           Math.round(parseInt(s.height, 10)/2) );
        }

        this.setDragElPos(iPageX, iPageY);

        YAHOO.util.Dom.setStyle(dragEl, "visibility", "visible"); 
    },
    _resizeProxy: function() {
        if (this.resizeFrame) {
            var DOM    = YAHOO.util.Dom;
            var el     = this.getEl();
            var dragEl = this.getDragEl();

            var bt = parseInt( DOM.getStyle(dragEl, "borderTopWidth"    ), 10);
            var br = parseInt( DOM.getStyle(dragEl, "borderRightWidth"  ), 10);
            var bb = parseInt( DOM.getStyle(dragEl, "borderBottomWidth" ), 10);
            var bl = parseInt( DOM.getStyle(dragEl, "borderLeftWidth"   ), 10);

            if (isNaN(bt)) { bt = 0; }
            if (isNaN(br)) { br = 0; }
            if (isNaN(bb)) { bb = 0; }
            if (isNaN(bl)) { bl = 0; }
            var newWidth  = Math.max(0, el.offsetWidth  - br - bl);
            var newHeight = Math.max(0, el.offsetHeight - bt - bb);
            DOM.setStyle( dragEl, "width",  newWidth  + "px" );
            DOM.setStyle( dragEl, "height", newHeight + "px" );
        }
    },
    b4MouseDown: function(e) {
        var x = YAHOO.util.Event.getPageX(e);
        var y = YAHOO.util.Event.getPageY(e);
        this.autoOffset(x, y);
        this.setDragElPos(x, y);
    },
    b4StartDrag: function(x, y) {
        this.showFrame(x, y);
    },
    b4EndDrag: function(e) {
        YAHOO.util.Dom.setStyle(this.getDragEl(), "visibility", "hidden"); 
    },
    endDrag: function(e) {
        var DOM = YAHOO.util.Dom;
        var lel = this.getEl();
        var del = this.getDragEl();
        DOM.setStyle(del, "visibility", ""); 
        DOM.setStyle(lel, "visibility", "hidden"); 
        YAHOO.util.DDM.moveToEl(lel, del);
        DOM.setStyle(del, "visibility", "hidden"); 
        DOM.setStyle(lel, "visibility", ""); 
    },

    toString: function() {
        return ("DDProxy " + this.id);
    }

});
YAHOO.util.DDTarget = function(id, sGroup, config) {
    if (id) {
        this.initTarget(id, sGroup, config);
    }
};
YAHOO.extend(YAHOO.util.DDTarget, YAHOO.util.DragDrop, {
    toString: function() {
        return ("DDTarget " + this.id);
    }
});