var PositionExt={};PositionExt._baseIndex=50;Object.extend(Object.extend(PositionExt,Position),{within:function(element,x,y){this.xcomp=x;this.ycomp=y;var pos=Sortable.containerPos[element.id];if(pos==null){if(element.parentNode&&element.parentNode.id)pos=Sortable.containerPos[element.parentNode.id];if(pos!=null){if(x<pos[0]||x>(pos[0]+element.offsetWidth[0]))return false;pos=[pos[0]+element.offsetLeft||0,pos[1]+element.offsetTop];}}if(pos==null)this.offset=this.cumulativeOffset(element);elsethis.offset=pos;if(PositionExt.allowVerticalScroll==true&&element.parentNode)this.offset[1]-=element.parentNode.scrollTop;return(y>=this.offset[1]&&y<this.offset[1]+element.offsetHeight&&x>=this.offset[0]&&x<this.offset[0]+element.offsetWidth);}});var Droppables={drops:[],remove:function(element){this.drops=this.drops.reject(function(d){return d.element==$(element)});},add:function(element){element=$(element);var options=Object.extend({greedy:true,hoverclass:null},arguments[1]||{});if(options.containment){options._containers=[];var containment=options.containment;if((typeof containment=='object')&&(containment.constructor==Array)){containment.each(function(c){options._containers.push($(c))});}else{options._containers.push($(containment));}options._containers.each(function(e){Element.setStyle(e,{zIndex:Element.getStyle(element,'zIndex')||'1'})});}if(options.accept)options.accept=[options.accept].flatten();Element.makePositioned(element);options.element=element;this.drops.push(options);},isContained:function(element,drop){var parentNode=element.parentNode;return drop._containers.detect(function(c){return parentNode==c});},isAffected:function(point,element,drop){if(!PositionExt.within(drop.element,point[0],point[1]))return false;return((drop.element!=element)&&((!drop._containers)||this.isContained(element,drop))&&((!drop.accept)||(Element.classNames(element).detect(function(v){return drop.accept.include(v)}))));},deactivate:function(drop){if(drop.hoverclass)Element.removeClassName(drop.element,drop.hoverclass);this.last_active=null;},activate:function(drop){if(drop.hoverclass)Element.addClassName(drop.element,drop.hoverclass);this.last_active=drop;},show:function(point,element){if(!this.drops.length)return;if(this.last_active)this.deactivate(this.last_active);this.drops.each(function(drop){if(Droppables.isAffected(point,element,drop)){if(drop.onHover){drop.onHover(element,drop.element,PositionExt.overlap(drop.overlap,drop.element));Droppables.activate(drop);}if(drop.greedy){Droppables.activate(drop);throw $break;}}});},fire:function(event,drag){if(!this.last_active)return;if(this.isAffected([Event.cursorX(event),Event.cursorY(event)],drag.element,this.last_active))if(this.last_active.onDrop)this.last_active.onDrop(drag,this.last_active.element,event);},reset:function(){if(this.last_active)this.deactivate(this.last_active);}}var Draggables={drags:[],observers:[],register:function(draggable){if(this.drags.length==0){this.eventMouseUp=this.endDrag.bindAsEventListener(this);this.eventMouseMove=this.updateDrag.bindAsEventListener(this);this.eventKeypress=this.keyPress.bindAsEventListener(this);Event.observe(document,"mouseup",this.eventMouseUp);Event.observe(document,"mousemove",this.eventMouseMove);Event.observe(document,"keypress",this.eventKeypress);}this.drags.push(draggable);},unregister:function(draggable){this.drags=this.drags.reject(function(d){return d==draggable});if(this.drags.length==0){Event.stopObserving(document,"mouseup",this.eventMouseUp);Event.stopObserving(document,"mousemove",this.eventMouseMove);Event.stopObserving(document,"keypress",this.eventKeypress);}},activate:function(draggable){window.focus();this.activeDraggable=draggable;},deactivate:function(){this.activeDraggable=null;},updateDrag:function(event){if(!this.activeDraggable)return;var _isScrolling=this.activeDraggable.checkScroll(Event.pointerY(event));if(_isScrolling)return;var pointer=[Event.cursorX(event),Event.cursorY(event)];if(this._lastPointer&&(this._lastPointer.inspect()==pointer.inspect()))return;this._lastPointer=pointer;this.activeDraggable.updateDrag(event,pointer);},endDrag:function(event){if(!this.activeDraggable)return;this._lastPointer=null;this.activeDraggable.endDrag(event);this.activeDraggable=null;},keyPress:function(event){if(this.activeDraggable)this.activeDraggable.keyPress(event);},addObserver:function(observer){this.observers.push(observer);this._cacheObserverCallbacks();},removeObserver:function(element){this.observers=this.observers.reject(function(o){return o.element==element});this._cacheObserverCallbacks();},notify:function(eventName,draggable,event){if(this[eventName+'Count']>0)this.observers.each(function(o){if(o[eventName])o[eventName](eventName,draggable,event);});},_cacheObserverCallbacks:function(){['onStart','onEnd','onDrag'].each(function(eventName){Draggables[eventName+'Count']=Draggables.observers.select(function(o){return o[eventName];}).length;});}}var Draggable=Class.create();Draggable.prototype={initialize:function(element){var options=Object.extend({handle:false,starteffect:function(element){new Effect.Opacity(element,{duration:0.2,from:1.0,to:0.7});},reverteffect:function(element,top_offset,left_offset){var dur=Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;element._revert=new Effect.Move(element,{x:-left_offset,y:-top_offset,duration:dur});},endeffect:function(element){new Effect.Opacity(element,{duration:0.2,from:0.7,to:1.0});},zindex:1000,revert:false,scroll:false,scrollSensitivity:20,scrollSpeed:15,snap:false,bodyScroll:null},arguments[1]||{});this.element=$(element);if(options.handle&&(typeof options.handle=='string'))this.handle=Element.childrenWithClassName(this.element,options.handle)[0];if(!this.handle)this.handle=$(options.handle);if(!this.handle)this.handle=this.element;if(options.scroll)options.scroll=$(options.scroll);Element.makePositioned(this.element);this.delta=options.currentDelta?options.currentDelta:this.currentDelta();this.options=options;this.dragging=false;this._bodyScroll=options.bodyScroll||null;this.eventMouseDown=this.initDrag.bindAsEventListener(this);Event.observe(this.handle,"mousedown",this.eventMouseDown);Draggables.register(this);},destroy:function(){Event.stopObserving(this.handle,"mousedown",this.eventMouseDown);Draggables.unregister(this);this.element._revert=null;this.element=null;this.options.starteffect=null;this.options.reverteffect=null;this.options.endeffect=null;this.options=null;},currentDelta:function(){return([parseInt(Element.getStyle(this.element,'left')||'0'),parseInt(Element.getStyle(this.element,'top')||'0')]);},initDrag:function(event){if(Event.isLeftClick(event)){var src=Event.element(event);if(src.tagName&&(src.tagName=='INPUT'||src.tagName=='SELECT'||src.tagName=='OPTION'||src.tagName=='BUTTON'||src.tagName=='TEXTAREA'))return;if(this.element._revert){this.element._revert.cancel();this.element._revert=null;}var pointer=[Event.cursorX(event),Event.cursorY(event)];var pos=PositionExt.cumulativeOffset(this.element);this.offset=[0,1].map(function(i){return(pointer[i]-pos[i])});Draggables.activate(this);Event.stop(event);}},startDrag:function(event){this.dragging=true;if(this._bodyScroll)document.ondrag=document.onselectstart=function(){return false;};if(this.options.ghosting){this._clone=this.element.cloneNode(true);PositionExt.absolutize(this.element);this.element.parentNode.insertBefore(this._clone,this.element);}if(this.options.scroll){this.originalScrollLeft=this.options.scroll.scrollLeft;this.originalScrollTop=this.options.scroll.scrollTop;}if(this.options.targeting){this.element.parentNode.style.zIndex=PositionExt._baseIndex++;}if(this.options.zindex){this.originalZ=parseInt(Element.getStyle(this.element,'z-index')||0);this.element.style.zIndex=this.options.zindex;}Draggables.notify('onStart',this,event);if(this.options.starteffect)this.options.starteffect(this.element);},updateDrag:function(event,pointer){if(!this.dragging)this.startDrag(event);Droppables.show(pointer,this.element);Draggables.notify('onDrag',this,event);this.draw(pointer);if(this.options.change)this.options.change(this);if(this.options.scroll){this.stopScrolling();var p=PositionExt.page(this.options.scroll);p[0]+=this.options.scroll.scrollLeft;p[1]+=this.options.scroll.scrollTop;p.push(p[0]+this.options.scroll.offsetWidth);p.push(p[1]+this.options.scroll.offsetHeight);var speed=[0,0];if(pointer[0]<(p[0]+this.options.scrollSensitivity))speed[0]=pointer[0]-(p[0]+this.options.scrollSensitivity);if(pointer[1]<(p[1]+this.options.scrollSensitivity))speed[1]=pointer[1]-(p[1]+this.options.scrollSensitivity);if(pointer[0]>(p[2]-this.options.scrollSensitivity))speed[0]=pointer[0]-(p[2]-this.options.scrollSensitivity);if(pointer[1]>(p[3]-this.options.scrollSensitivity))speed[1]=pointer[1]-(p[3]-this.options.scrollSensitivity);this.startScrolling(speed);}if(navigator.appVersion.indexOf('AppleWebKit')>0)window.scrollBy(0,0);Event.stop(event);},checkScroll:function(_pointerY){if(!this._bodyScroll)return false;if(_pointerY>20&&_pointerY<this._bodyScroll.body.offsetHeight-20){this.clearScroll();return false;}Draggable.___Step=(_pointerY<20?-1:1)*this._bodyScroll.step;if(Draggable.___Timer)return true;Draggable.___Timer=window.setInterval(this.scrollBody.bind(this),this._bodyScroll.interval);return true;},scrollBody:function(){var _body=this._bodyScroll.body,_scrollTop=parseInt(_body.scrollTop)||0;_curSTop=_scrollTop+Draggable.___Step;if(_scrollTop<0||_curSTop==Draggable.___ScrTop){this.clearScroll();return;}var _style=this.element.style,_top=parseInt(_style.top)||0;_style.top=(_top+Draggable.___Step)+'px';_body.scrollTop=_curSTop;Draggable.___ScrTop=_curSTop;},clearScroll:function(){if(!Draggable.___Timer)return;Draggable.___Step=0;Draggable.___Timer=window.clearInterval(Draggable.___Timer);},finishDrag:function(event,success){this.dragging=false;if(this.options.ghosting){PositionExt.relativize(this.element);Element.remove(this._clone);this._clone=null;}if(success)Droppables.fire(event,this);Draggables.notify('onEnd',this,event);if(this.options.targeting&&this.element._lastPointerPos){PositionExt.relativize(this.element);this.draw(this.element._lastPointerPos);}var revert=this.options.revert;if(revert&&typeof revert=='function')revert=revert(this.element);var d=this.currentDelta();if(revert&&this.options.reverteffect){this.options.reverteffect.apply(this,[this.element,d[1]-this.delta[1],d[0]-this.delta[0]]);}else{this.delta=d;}Sortable.resize(this.element);if(this.options.zindex){this.element.style.zIndex=this.originalZ;}if(this.options.endeffect)this.options.endeffect(this.element);Draggables.deactivate(this);Droppables.reset();},keyPress:function(event){if(event.keyCode!=Event.KEY_ESC)return;this.finishDrag(event,false);Event.stop(event);},endDrag:function(event){if(!this.dragging)return;if(this._bodyScroll)document.ondrag=document.onselectstart=null;this.stopScrolling();this.finishDrag(event,true);Event.stop(event);},draw:function(point){this.element._lastPointerPos=[point[0],point[1]];var pos;if(this.element.parentNode&&this.element.parentNode.id)pos=Sortable.containerPos[this.element.parentNode.id];if(pos==null)pos=PositionExt.cumulativeOffset(this.element);elsepos=[pos[0]+this.element.offsetLeft||0,pos[1]+this.element.offsetTop];var d=this.currentDelta();pos[0]-=d[0];pos[1]-=d[1];if(this.options.scroll){pos[0]-=this.options.scroll.scrollLeft-this.originalScrollLeft;pos[1]-=this.options.scroll.scrollTop-this.originalScrollTop;}var p=[0,1].map(function(i){return(point[i]-pos[i]-this.offset[i])}.bind(this));if(this.options.snap){if(typeof this.options.snap=='function'){p=this.options.snap(p[0],p[1]);}else{if(this.options.snap instanceof Array){p=p.map(function(v,i){return Math.round(v/this.options.snap[i])*this.options.snap[i]}.bind(this))}else{p=p.map(function(v){return Math.round(v/this.options.snap)*this.options.snap}.bind(this))}}}var style=this.element.style;if((!this.options.constraint)||(this.options.constraint=='horizontal'))style.left=p[0]+"px";if((!this.options.constraint)||(this.options.constraint=='vertical'))style.top=p[1]+"px";if(style.visibility=="hidden")style.visibility="";},stopScrolling:function(){if(this.scrollInterval){clearInterval(this.scrollInterval);this.scrollInterval=null;}},startScrolling:function(speed){this.scrollSpeed=[speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];this.lastScrolled=new Date();this.scrollInterval=setInterval(this.scroll.bind(this),10);},scroll:function(){var current=new Date();var delta=current-this.lastScrolled;this.lastScrolled=current;this.options.scroll.scrollLeft+=this.scrollSpeed[0]*delta/1000;this.options.scroll.scrollTop+=this.scrollSpeed[1]*delta/1000;Droppables.show(Draggables._lastPointer,this.element);Draggables.notify('onDrag',this);this.draw(Draggables._lastPointer);if(this.options.change)this.options.change(this);}}var SortableObserver=Class.create();SortableObserver.prototype={initialize:function(element,observer){this.element=$(element);this.observer=observer;this.lastValue=Sortable.serialize(this.element);},onStart:function(){this.lastValue=Sortable.serialize(this.element);},onEnd:function(){Sortable.unmark();Sortable.untarget();if(this.lastValue!=Sortable.serialize(this.element))this.observer(this.element)}}var Sortable={sortables:new Array(),containerPos:{},options:function(element){element=$(element);return this.sortables.detect(function(s){return s.element==element});},destroy:function(element){element=$(element);this.sortables.findAll(function(s){return s.element==element||s.element.id==element.id}).each(function(s){Draggables.removeObserver(s.element);s.droppables.each(function(d){Droppables.remove(d)});s.draggables.invoke('destroy');});this.sortables=this.sortables.reject(function(s){return s.element==element||s.element.id==element.id});},clear:function(){this.sortables=this.sortables.reject(function(s){return $(s.element.id)==null});},resize:Prototype.emptyFunction,create:function(element){element=$(element);this.containerPos[element.id]=PositionExt.cumulativeOffset(element);if(element==null)return;var options=Object.extend({element:element,tag:'li',dropOnEmpty:false,tree:false,overlap:'vertical',constraint:'vertical',containment:element,handle:false,only:false,hoverclass:null,ghosting:false,scroll:false,format:/^[^_]*_(.*)$/,targeting:false,allowVerticalScroll:false,bodyScroll:null,resize:Prototype.emptyFunction,onChange:Prototype.emptyFunction,onUpdate:Prototype.emptyFunction},arguments[1]||{});PositionExt.allowVerticalScroll=options.allowVerticalScroll;this.destroy(element);this.resize=options.resize;var options_for_draggable={targeting:options.targeting,revert:true,scroll:options.scroll,ghosting:options.ghosting,constraint:options.constraint,handle:options.handle,bodyScroll:options.bodyScroll};if(options.starteffect)options_for_draggable.starteffect=options.starteffect;if(options.reverteffect)options_for_draggable.reverteffect=options.reverteffect;elseif(options.ghosting)options_for_draggable.reverteffect=function(element){element.style.top=0;element.style.left=0;};if(options.endeffect)options_for_draggable.endeffect=options.endeffect;if(options.zindex)options_for_draggable.zindex=options.zindex;if(options.currentDelta)