if (!YAHOO.util.DragDropMgr) {

YAHOO.util.DragDropMgr = function() {

    var Event = YAHOO.util.Event,
        Dom = YAHOO.util.Dom;

    return {
    
        useShim: false,
        
        _shimActive: false,
       
        _shimState: false,
        
        _debugShim: false,
       
        _createShim: function() {
            var s = document.createElement('div');
            s.id = 'yui-ddm-shim';
            if (document.body.firstChild) {
                document.body.insertBefore(s, document.body.firstChild);
            } else {
                document.body.appendChild(s);
            }
            s.style.display = 'none';
            s.style.backgroundColor = 'red';
            s.style.position = 'absolute';
            s.style.zIndex = '99999';
            Dom.setStyle(s, 'opacity', '0');
            this._shim = s;
            Event.on(s, "mouseup",   this.handleMouseUp, this, true);
            Event.on(s, "mousemove", this.handleMouseMove, this, true);
            Event.on(window, 'scroll', this._sizeShim, this, true);
        },
        
        _sizeShim: function() {
            if (this._shimActive) {
                var s = this._shim;
                s.style.height = Dom.getDocumentHeight() + 'px';
                s.style.width = Dom.getDocumentWidth() + 'px';
                s.style.top = '0';
                s.style.left = '0';
            }
        },
       
        _activateShim: function() {
            if (this.useShim) {
                if (!this._shim) {
                    this._createShim();
                }
                this._shimActive = true;
                var s = this._shim,
                    o = '0';
                if (this._debugShim) {
                    o = '.5';
                }
                Dom.setStyle(s, 'opacity', o);
                this._sizeShim();
                s.style.display = 'block';
            }
        },
        
        _deactivateShim: function() {
            this._shim.style.display = 'none';
            this._shimActive = false;
        },
        
        _shim: null,
        
        ids: {},

        handleIds: {},

        dragCurrent: null,

        dragOvers: {},

        deltaX: 0,

        deltaY: 0,

        preventDefault: true,

       
        stopPropagation: true,

        initialized: false,

        
        locked: false,

        interactionInfo: null,

        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);
            // Event.on(window,   "mouseout",    this._test);

        },

        _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,

        fromTimeout: false,

        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) {
                    var item = this.ids[g];
                    if (item && item[oDD.id]) {
                        delete item[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 (var 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._activateShim();

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

            this.dragCurrent = oDD;

            var el = oDD.getEl();

            // track start position
            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);
                        DDM.fromTimeout = true;
                    }, 
                    this.clickTimeThresh );
        },

        
        startDrag: function(x, y) {
            if (this.dragCurrent && this.dragCurrent.useShim) {
                this._shimState = this.useShim;
                this.useShim = true;
            }
            this._activateShim();
            clearTimeout(this.clickTimeout);
            var dc = this.dragCurrent;
            if (dc && dc.events.b4StartDrag) {
                dc.b4StartDrag(x, y);
                dc.fireEvent('b4StartDragEvent', { x: x, y: y });
            }
            if (dc && dc.events.startDrag) {
                dc.startDrag(x, y);
                dc.fireEvent('startDragEvent', { x: x, y: y });
            }
            this.dragThreshMet = true;
        },

        
        handleMouseUp: function(e) {
            if (this.dragCurrent) {
                clearTimeout(this.clickTimeout);

                if (this.dragThreshMet) {
                    if (this.fromTimeout) {
                        this.fromTimeout = false;
                        this.handleMouseMove(e);
                    }
                    this.fromTimeout = false;
                    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, silent) {
            var dc = this.dragCurrent;
            // Fire the drag end event for the item that was dragged
            if (dc && !silent) {
                if (this.dragThreshMet) {
                    if (dc.events.b4EndDrag) {
                        dc.b4EndDrag(e);
                        dc.fireEvent('b4EndDragEvent', { e: e });
                    }
                    if (dc.events.endDrag) {
                        dc.endDrag(e);
                        dc.fireEvent('endDragEvent', { e: e });
                    }
                }
                if (dc.events.mouseUp) {
                    dc.onMouseUp(e);
                    dc.fireEvent('mouseUpEvent', { e: e });
                }
            }

            if (this._shimActive) {
                this._deactivateShim();
                if (this.dragCurrent && this.dragCurrent.useShim) {
                    this.useShim = this._shimState;
                    this._shimState = false;
                }
            }

            this.dragCurrent = null;
            this.dragOvers = {};
        },

        
        handleMouseMove: function(e) {

            var dc = this.dragCurrent;
            if (dc) {

                // var button = e.which || e.button;

                // check for IE mouseup outside of page boundary
                if (YAHOO.util.Event.isIE && !e.button) {
                    this.stopEvent(e);
                    return this.handleMouseUp(e);
                } else {
                    if (e.clientX < 0 || e.clientY < 0) {
                        //This will stop the element from leaving the viewport in FF, Opera & Safari
                        //Not turned on yet
                        //this.stopEvent(e);
                        //return false;
                    }
                }

                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) {
                    if (dc && dc.events.b4Drag) {
                        dc.b4Drag(e);
                        dc.fireEvent('b4DragEvent', { e: e});
                    }
                    if (dc && dc.events.drag) {
                        dc.onDrag(e);
                        dc.fireEvent('dragEvent', { e: e});
                    }
                    if (dc) {
                        this.fireEvents(e, false);
                    }
                }

                this.stopEvent(e);
            }
        },
        
        
        fireEvents: function(e, isDrop) {
            var dc = this.dragCurrent;

            // If the user did the mouse up outside of the window, we could 
            // get here even though we have ended the drag.
            // If the config option dragOnly is true, bail out and don't fire the events
            if (!dc || dc.isLocked() || dc.dragOnly) {
                return;
            }

            var x = YAHOO.util.Event.getPageX(e),
                y = YAHOO.util.Event.getPageY(e),
                pt = new YAHOO.util.Point(x,y),
                pos = dc.getTargetCoord(pt.x, pt.y),
                el = dc.getDragEl(),
                events = ['out', 'over', 'drop', 'enter'],
                curRegion = new YAHOO.util.Region( pos.y, 
                                               pos.x + el.offsetWidth,
                                               pos.y + el.offsetHeight, 
                                               pos.x ),
            
                oldOvers = [], // cache the previous dragOver array
                inGroupsObj  = {},
                inGroups  = [],
                data = {
                    outEvts: [],
                    overEvts: [],
                    dropEvts: [],
                    enterEvts: []
                };


            // Check to see if the object(s) we were hovering over is no longer 
            // being hovered over so we can fire the onDragOut event
            for (var i in this.dragOvers) {

                var ddo = this.dragOvers[i];

                if (! this.isTypeOfDD(ddo)) {
                    continue;
                }
                if (! this.isOverTarget(pt, ddo, this.mode, curRegion)) {
                    data.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, curRegion)) {
                            inGroupsObj[sGroup] = true;
                            // look for drop interactions
                            if (isDrop) {
                                data.dropEvts.push( oDD );
                            // look for drag enter and drag over interactions
                            } else {

                                // initial drag over: dragEnter fires
                                if (!oldOvers[oDD.id]) {
                                    data.enterEvts.push( oDD );
                                // subsequent drag overs: dragOver fires
                                } else {
                                    data.overEvts.push( oDD );
                                }

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

            this.interactionInfo = {
                out:       data.outEvts,
                enter:     data.enterEvts,
                over:      data.overEvts,
                drop:      data.dropEvts,
                point:     pt,
                draggedRegion:    curRegion,
                sourceRegion: this.locationCache[dc.id],
                validDrop: isDrop
            };

            
            for (var inG in inGroupsObj) {
                inGroups.push(inG);
            }

            // notify about a drop that did not find a target
            if (isDrop && !data.dropEvts.length) {
                this.interactionInfo.validDrop = false;
                if (dc.events.invalidDrop) {
                    dc.onInvalidDrop(e);
                    dc.fireEvent('invalidDropEvent', { e: e });
                }
            }
            for (i = 0; i < events.length; i++) {
                var tmp = null;
                if (data[events[i] + 'Evts']) {
                    tmp = data[events[i] + 'Evts'];
                }
                if (tmp && tmp.length) {
                    var type = events[i].charAt(0).toUpperCase() + events[i].substr(1),
                        ev = 'onDrag' + type,
                        b4 = 'b4Drag' + type,
                        cev = 'drag' + type + 'Event',
                        check = 'drag' + type;
                    if (this.mode) {
                        if (dc.events[b4]) {
                            dc[b4](e, tmp, inGroups);
                            dc.fireEvent(b4 + 'Event', { event: e, info: tmp, group: inGroups });
                            
                        }
                        if (dc.events[check]) {
                            dc[ev](e, tmp, inGroups);
                            dc.fireEvent(cev, { event: e, info: tmp, group: inGroups });
                        }
                    } else {
                        for (var b = 0, len = tmp.length; b < len; ++b) {
                            if (dc.events[b4]) {
                                dc[b4](e, tmp[b].id, inGroups[0]);
                                dc.fireEvent(b4 + 'Event', { event: e, info: tmp[b].id, group: inGroups[0] });
                            }
                            if (dc.events[check]) {
                                dc[ev](e, tmp[b].id, inGroups[0]);
                                dc.fireEvent(cev, { event: e, info: tmp[b].id, group: inGroups[0] });
                            }
                        }
                    }
                }
            }
        },

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

            var len = dds.length;

            if (len == 1) {
                winner = dds[0];
            } else {
                // Loop through the targeted items
                for (var i=0; i<len; ++i) {
                    var dd = dds[i];
                    // If the cursor is over the object, it wins.  If the 
                    // cursor is over multiple matches, the first one we come
                    // to wins.
                    if (this.mode == this.INTERSECT && dd.cursorIsOver) {
                        winner = dd;
                        break;
                    // Otherwise the object with the most overlap wins
                    } else {
                        if (!winner || !winner.overlap || (dd.overlap &&
                            winner.overlap.getArea() < dd.overlap.getArea())) {
                            winner = dd;
                        }
                    }
                }
            }

            return winner;
        },

        
        refreshCache: function(groups) {

            // refresh everything if group array is not provided
            var g = groups || this.ids;

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

                    if (this.isTypeOfDD(oDD)) {
                        var loc = this.getLocation(oDD);
                        if (loc) {
                            this.locationCache[oDD.id] = loc;
                        } else {
                            delete this.locationCache[oDD.id];
                        }
                    }
                }
            }
        },

        
        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, curRegion) {
            // use cache if available
            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 || (!intersect && !dc.constrainX && !dc.constrainY)) {

                //if (oTarget.cursorIsOver) {
                //}
                return oTarget.cursorIsOver;
            }

            oTarget.overlap = null;


            // Get the current location of the drag element, this is the
            // location of the mouse event less the delta that represents
            // where the original mousedown happened on the element.  We
            // need to consider constraints and ticks as well.

            if (!curRegion) {
                var pos = dc.getTargetCoord(pt.x, pt.y);
                var el = dc.getDragEl();
                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 (var 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 {
            }
            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 {
                // check to see if this is a text node child of the one we want
                var p = node.parentNode;

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

            return false;
        }

    };

}();

// shorter alias, save a few bytes
YAHOO.util.DDM = YAHOO.util.DragDropMgr;
YAHOO.util.DDM._addListeners();

}

(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 = {
   
    events: null,
    
    on: function() {
        this.subscribe.apply(this, arguments);
    },
    
    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,
    
    dragOnly: false,

    useShim: false,

    _domRef: null,

    __ygDragDrop: true,

    constrainX: false,

    constrainY: false,

    minX: 0,

    maxX: 0,

    minY: 0,

    maxY: 0,

    deltaX: 0,

    deltaY: 0,

    maintainOffset: false,

    xTicks: null,

    yTicks: null,

    primaryButtonOnly: true,
    
    available: false,

    hasOuterHandles: false,

    cursorIsOver: false,

    overlap: null,

    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._domRef || this.id, "mousedown", 
                        this.handleMouseDown, this, true);

        // Event.on(this.id, "selectstart", Event.preventDefault);
        for (var i in this.events) {
            this.createEvent(i + 'Event');
        }
        
    },

   
    initTarget: function(id, sGroup, config) {

        // configuration attributes 
        this.config = config || {};

        this.events = {};

        // create a local reference to the drag and drop manager
        this.DDM = YAHOO.util.DDM;

        // initialize the groups object
        this.groups = {};

        // assume that we have an element reference instead of an id if the
        // parameter is not a string
        if (typeof id !== "string") {
            this._domRef = id;
            id = Dom.generateId(id);
        }

        // set the id
        this.id = id;

        // add to an interaction group
        this.addToGroup((sGroup) ? sGroup : "default");

        // We don't want to register this as the handle with the manager
        // so we just set the id rather than calling the setter.
        this.handleElId = id;

        Event.onAvailable(id, this.handleOnAvailable, this, true);


        // the linked element is the element that gets dragged by default
        this.setDragElId(id); 

        // by default, clicked anchors will not start drag operations. 
        // @TODO what else should be here?  Probably form fields.
        this.invalidHandleTypes = { A: "A" };
        this.invalidHandleIds = {};
        this.invalidHandleClasses = [];

        this.applyConfig();
    },

    applyConfig: function() {
        this.events = {
            mouseDown: true,
            b4MouseDown: true,
            mouseUp: true,
            b4StartDrag: true,
            startDrag: true,
            b4EndDrag: true,
            endDrag: true,
            drag: true,
            b4Drag: true,
            invalidDrop: true,
            b4DragOut: true,
            dragOut: true,
            dragEnter: true,
            b4DragOver: true,
            dragOver: true,
            b4DragDrop: true,
            dragDrop: true
        };
        
        if (this.config.events) {
            for (var i in this.config.events) {
                if (this.config.events[i] === false) {
                    this.events[i] = false;
                }
            }
        }


        // configurable properties: 
        //    padding, isTarget, maintainOffset, primaryButtonOnly
        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);
        this.dragOnly = ((this.config.dragOnly === true) ? true : false);
        this.useShim = ((this.config.useShim === true) ? true : false);
    },

    
    handleOnAvailable: function() {
        this.available = true;
        this.resetConstraints();
        this.onAvailable();
    },

     
    setPadding: function(iTop, iRight, iBot, iLeft) {
        // this.padding = [iLeft, iRight, iTop, iBot];
        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)) {
            if (el && el.style && (el.style.display == 'none')) {
            } else {
            }
            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") {
            id = Dom.generateId(id);
        }
        this.handleElId = id;
        this.DDM.regHandle(this.id, id);
    },

    setOuterHandleElId: function(id) {
        if (typeof id !== "string") {
            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;
        }



        // firing the mousedown events prior to calculating positions
        var b4Return = this.b4MouseDown(e),
        b4Return2 = true;

        if (this.events.b4MouseDown) {
            b4Return2 = this.fireEvent('b4MouseDownEvent', e);
        }
        var mDownReturn = this.onMouseDown(e),
            mDownReturn2 = true;
        if (this.events.mouseDown) {
            mDownReturn2 = this.fireEvent('mouseDownEvent', e);
        }

        if ((b4Return === false) || (mDownReturn === false) || (b4Return2 === false) || (mDownReturn2 === false)) {
            return;
        }

        this.DDM.refreshCache(this.groups);
        // var self = this;
        // setTimeout( function() { self.DDM.refreshCache(self.groups); }, 0);

        // Only process the event if we really clicked within the linked 
        // element.  The reason we make this check is that in the case that 
        // another element was moved between the clicked element and the 
        // cursor in the time between the mousedown and mouseup events. When 
        // this happens, the element gets the next mousedown event 
        // regardless of where on the screen it happened.  
        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)) {


                // set the initial element position
                this.setStartPosition();

                // start tracking mousemove distance and mousedown time to
                // determine when to start the actual drag
                this.DDM.handleMouseDown(e, this);

                // this mousedown is mine
                this.DDM.stopEvent(e);
            } else {


            }
        }
    },

   
    clickValidator: function(e) {
        var target = YAHOO.util.Event.getTarget(e);
        return ( this.isValidHandleChild(target) &&
                    (this.id == this.handleElId || 
                        this.DDM.handleWasClicked(target, this.id)) );
    },

   
    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};
    },

   
    addInvalidHandleType: function(tagName) {
        var type = tagName.toUpperCase();
        this.invalidHandleTypes[type] = type;
    },

  
    addInvalidHandleId: function(id) {
        if (typeof id !== "string") {
            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") {
            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 n = (node.nodeName == "#text") ? node.parentNode : node;
        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 = parseInt(iLeft, 10);
        this.rightConstraint = parseInt(iRight, 10);

        this.minX = this.initPageX - this.leftConstraint;
        this.maxX = this.initPageX + this.rightConstraint;
        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 = parseInt(iUp, 10);
        this.bottomConstraint = parseInt(iDown, 10);

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

        this.constrainY = true;
        
    },

   
    resetConstraints: function() {


        // Maintain offsets if necessary
        if (this.initPageX || this.initPageX === 0) {
            // figure out how much this thing has moved
            var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
            var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;

            this.setInitPosition(dx, dy);

        // This is the first time we have detected the element's position
        } 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) {
            // If tick interval is not defined, it is effectively 1 pixel, 
            // so we return the value passed to us.
            return val; 
        } else if (tickArray[0] >= val) {
            // The value is lower than the first tick, so we return the first
            // tick.
            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];
                }
            }

            // The value is larger than the last tick, so we return the last
            // tick.
            return tickArray[tickArray.length - 1];
        }
    },

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

};
YAHOO.augment(YAHOO.util.DragDrop, YAHOO.util.EventProvider);

})();

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) {
        // the first time we do this, we are going to check to make sure
        // the element has css positioning

        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);
        var self = this;
        setTimeout(function() {
            self.autoScroll.call(self, oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
        }, 0);
    },

  
    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) {
            // The client height
            var clientH = this.DDM.getClientHeight();

            // The client width
            var clientW = this.DDM.getClientWidth();

            // The amt scrolled down
            var st = this.DDM.getScrollTop();

            // The amt scrolled right
            var sl = this.DDM.getScrollLeft();

            // Location of the bottom of the element
            var bot = h + y;

            // Location of the right of the element
            var right = w + x;

            // The distance from the cursor to the bottom of the visible area, 
            // adjusted so that we don't scroll if the cursor is beyond the
            // element drag constraints
            var toBot = (clientH + st - y - this.deltaY);

            // The distance from the cursor to the right of the visible area
            var toRight = (clientW + sl - x - this.deltaX);


            // How close to the edge the cursor must be before we scroll
            // var thresh = (document.all) ? 100 : 40;
            var thresh = 40;

            // How many pixels to scroll per autoscroll op.  This helps to reduce 
            // clunky scrolling. IE is more sensitive about this ... it needs this 
            // value to be higher.
            var scrAmt = (document.all) ? 80 : 30;

            // Scroll down if we are near the bottom of the visible page and the 
            // obj extends below the crease
            if ( bot > clientH && toBot < thresh ) { 
                window.scrollTo(sl, st + scrAmt); 
            }

            // Scroll up if the window is scrolled down and the top of the object
            // goes above the top border
            if ( y < st && st > 0 && y - st < thresh ) { 
                window.scrollTo(sl, st - scrAmt); 
            }

            // Scroll right if the obj is beyond the right border and the cursor is
            // near the border.
            if ( right > clientW && toRight < thresh ) { 
                window.scrollTo(sl + scrAmt, st); 
            }

            // Scroll left if the window has been scrolled to the right and the obj
            // extends past the left border
            if ( x < sl && sl > 0 && x - sl < thresh ) { 
                window.scrollTo(sl - scrAmt, st);
            }
        }
    },

    
    applyConfig: function() {
        YAHOO.util.DD.superclass.applyConfig.call(this);
        this.scroll = (this.config.scroll !== false);
    },

   
    b4MouseDown: function(e) {
        this.setStartPosition();
        // this.resetConstraints();
        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, body=document.body;

        if (!body || !body.firstChild) {
            setTimeout( function() { self.createFrame(); }, 50 );
            return;
        }

        var div=this.getDragEl(), Dom=YAHOO.util.Dom;

        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;
            s.height     = "25px";
            s.width      = "25px";

            var _data = document.createElement('div');
            Dom.setStyle(_data, 'height', '100%');
            Dom.setStyle(_data, 'width', '100%');
           
            Dom.setStyle(_data, 'background-color', '#ccc');
            Dom.setStyle(_data, 'opacity', '0');
            div.appendChild(_data);

           
            if (YAHOO.env.ua.ie) {
                //Only needed for Internet Explorer
                var ifr = document.createElement('iframe');
                ifr.setAttribute('src', 'javascript: false;');
                ifr.setAttribute('scrolling', 'no');
                ifr.setAttribute('frameborder', '0');
                div.insertBefore(ifr, div.firstChild);
                Dom.setStyle(ifr, 'height', '100%');
                Dom.setStyle(ifr, 'width', '100%');
                Dom.setStyle(ifr, 'position', 'absolute');
                Dom.setStyle(ifr, 'top', '0');
                Dom.setStyle(ifr, 'left', '0');
                Dom.setStyle(ifr, 'opacity', '0');
                Dom.setStyle(ifr, 'zIndex', '-1');
                Dom.setStyle(ifr.nextSibling, 'zIndex', '2');
            }

            // appendChild can blow up IE if invoked prior to the window load event
            // while rendering a table.  It is possible there are other scenarios 
            // that would cause this to happen as well.
            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" );
        }
    },

    // overrides YAHOO.util.DragDrop
    b4MouseDown: function(e) {
        this.setStartPosition();
        var x = YAHOO.util.Event.getPageX(e);
        var y = YAHOO.util.Event.getPageY(e);
        this.autoOffset(x, y);

        // This causes the autoscroll code to kick off, which means autoscroll can
        // happen prior to the check for a valid drag handle.
        // this.setDragElPos(x, y);
    },

    // overrides YAHOO.util.DragDrop
    b4StartDrag: function(x, y) {
        // show the drag frame
        this.showFrame(x, y);
    },

    // overrides YAHOO.util.DragDrop
    b4EndDrag: function(e) {
        YAHOO.util.Dom.setStyle(this.getDragEl(), "visibility", "hidden"); 
    },

    // overrides YAHOO.util.DragDrop
    // By default we try to move the element to the last location of the frame.  
    // This is so that the default behavior mirrors that of YAHOO.util.DD.  
    endDrag: function(e) {
        var DOM = YAHOO.util.Dom;
        var lel = this.getEl();
        var del = this.getDragEl();

        // Show the drag frame briefly so we can get its position
        // del.style.visibility = "";
        DOM.setStyle(del, "visibility", ""); 

        // Hide the linked element before the move to get around a Safari 
        // rendering bug.
        //lel.style.visibility = "hidden";
        DOM.setStyle(lel, "visibility", "hidden"); 
        YAHOO.util.DDM.moveToEl(lel, del);
        //del.style.visibility = "hidden";
        DOM.setStyle(del, "visibility", "hidden"); 
        //lel.style.visibility = "";
        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.util.DDTarget.prototype = new YAHOO.util.DragDrop();
YAHOO.extend(YAHOO.util.DDTarget, YAHOO.util.DragDrop, {
    toString: function() {
        return ("DDTarget " + this.id);
    }
});
YAHOO.register("dragdrop", YAHOO.util.DragDropMgr, {version: "2.6.0", build: "1321"});