// script.aculo.us dragdrop.js v1.8.3, Thu Oct 08 11:23:33 +0200 2009
// Copyright (c) 2005-2009 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/
if(Object.isUndefined(Effect))throw"dragdrop.js requires including script.aculo.us' effects.js library";var Droppables={drops:[],remove:function(e){this.drops=this.drops.reject(function(t){return t.element==$(e)})},add:function(e){e=$(e);var t=Object.extend({greedy:!0,hoverclass:null,tree:!1},arguments[1]||{});if(t.containment){t._containers=[];var n=t.containment;Object.isArray(n)?n.each(function(e){t._containers.push($(e))}):t._containers.push($(n))}t.accept&&(t.accept=[t.accept].flatten()),Element.makePositioned(e),t.element=e,this.drops.push(t)},findDeepestChild:function(e){deepest=e[0];for(i=1;i<e.length;++i)Element.isParent(e[i].element,deepest.element)&&(deepest=e[i]);return deepest},isContained:function(e,t){var n;return t.tree?n=e.treeNode:n=e.parentNode,t._containers.detect(function(e){return n==e})},isAffected:function(e,t,n){return n.element!=t&&(!n._containers||this.isContained(t,n))&&(!n.accept||Element.classNames(t).detect(function(e){return n.accept.include(e)}))&&Position.within(n.element,e[0],e[1])},deactivate:function(e){e.hoverclass&&Element.removeClassName(e.element,e.hoverclass),this.last_active=null},activate:function(e){e.hoverclass&&Element.addClassName(e.element,e.hoverclass),this.last_active=e},show:function(e,t){if(!this.drops.length)return;var n,r=[];this.drops.each(function(n){Droppables.isAffected(e,t,n)&&r.push(n)}),r.length>0&&(n=Droppables.findDeepestChild(r)),this.last_active&&this.last_active!=n&&this.deactivate(this.last_active),n&&(Position.within(n.element,e[0],e[1]),n.onHover&&n.onHover(t,n.element,Position.overlap(n.overlap,n.element)),n!=this.last_active&&Droppables.activate(n))},fire:function(e,t){if(!this.last_active)return;Position.prepare();if(this.isAffected([Event.pointerX(e),Event.pointerY(e)],t,this.last_active)&&this.last_active.onDrop)return this.last_active.onDrop(t,this.last_active.element,e),!0},reset:function(){this.last_active&&this.deactivate(this.last_active)}},Draggables={drags:[],observers:[],register:function(e){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(e)},unregister:function(e){this.drags=this.drags.reject(function(t){return t==e}),this.drags.length==0&&(Event.stopObserving(document,"mouseup",this.eventMouseUp),Event.stopObserving(document,"mousemove",this.eventMouseMove),Event.stopObserving(document,"keypress",this.eventKeypress))},activate:function(e){e.options.delay?this._timeout=setTimeout(function(){Draggables._timeout=null,window.focus(),Draggables.activeDraggable=e}.bind(this),e.options.delay):(window.focus(),this.activeDraggable=e)},deactivate:function(){this.activeDraggable=null},updateDrag:function(e){if(!this.activeDraggable)return;var t=[Event.pointerX(e),Event.pointerY(e)];if(this._lastPointer&&this._lastPointer.inspect()==t.inspect())return;this._lastPointer=t,this.activeDraggable.updateDrag(e,t)},endDrag:function(e){this._timeout&&(clearTimeout(this._timeout),this._timeout=null);if(!this.activeDraggable)return;this._lastPointer=null,this.activeDraggable.endDrag(e),this.activeDraggable=null},keyPress:function(e){this.activeDraggable&&this.activeDraggable.keyPress(e)},addObserver:function(e){this.observers.push(e),this._cacheObserverCallbacks()},removeObserver:function(e){this.observers=this.observers.reject(function(t){return t.element==e}),this._cacheObserverCallbacks()},notify:function(e,t,n){this[e+"Count"]>0&&this.observers.each(function(r){r[e]&&r[e](e,t,n)}),t.options[e]&&t.options[e](t,n)},_cacheObserverCallbacks:function(){["onStart","onEnd","onDrag"].each(function(e){Draggables[e+"Count"]=Draggables.observers.select(function(t){return t[e]}).length})}},Draggable=Class.create({initialize:function(e){var t={handle:!1,reverteffect:function(e,t,n){var r=Math.sqrt(Math.abs(t^2)+Math.abs(n^2))*.02;new Effect.Move(e,{x:-n,y:-t,duration:r,queue:{scope:"_draggable",position:"end"}})},endeffect:function(e){var t=Object.isNumber(e._opacity)?e._opacity:1;new Effect.Opacity(e,{duration:.2,from:.7,to:t,queue:{scope:"_draggable",position:"end"},afterFinish:function(){Draggable._dragging[e]=!1}})},zindex:1e3,revert:!1,quiet:!1,scroll:!1,scrollSensitivity:20,scrollSpeed:15,snap:!1,delay:0};(!arguments[1]||Object.isUndefined(arguments[1].endeffect))&&Object.extend(t,{starteffect:function(e){e._opacity=Element.getOpacity(e),Draggable._dragging[e]=!0,new Effect.Opacity(e,{duration:.2,from:e._opacity,to:.7})}});var n=Object.extend(t,arguments[1]||{});this.element=$(e),n.handle&&Object.isString(n.handle)&&(this.handle=this.element.down("."+n.handle,0)),this.handle||(this.handle=$(n.handle)),this.handle||(this.handle=this.element),n.scroll&&!n.scroll.scrollTo&&!n.scroll.outerHTML&&(n.scroll=$(n.scroll),this._isScrollChild=Element.childOf(this.element,n.scroll)),Element.makePositioned(this.element),this.options=n,this.dragging=!1,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)},currentDelta:function(){return[parseInt(Element.getStyle(this.element,"left")||"0"),parseInt(Element.getStyle(this.element,"top")||"0")]},initDrag:function(e){if(!Object.isUndefined(Draggable._dragging[this.element])&&Draggable._dragging[this.element])return;if(Event.isLeftClick(e)){var t=Event.element(e);if(!(!(tag_name=t.tagName.toUpperCase())||tag_name!="INPUT"&&tag_name!="SELECT"&&tag_name!="OPTION"&&tag_name!="BUTTON"&&tag_name!="TEXTAREA"))return;var n=[Event.pointerX(e),Event.pointerY(e)],r=this.element.cumulativeOffset();this.offset=[0,1].map(function(e){return n[e]-r[e]}),Draggables.activate(this),Event.stop(e)}},startDrag:function(e){this.dragging=!0,this.delta||(this.delta=this.currentDelta()),this.options.zindex&&(this.originalZ=parseInt(Element.getStyle(this.element,"z-index")||0),this.element.style.zIndex=this.options.zindex),this.options.ghosting&&(this._clone=this.element.cloneNode(!0),this._originallyAbsolute=this.element.getStyle("position")=="absolute",this._originallyAbsolute||Position.absolutize(this.element),this.element.parentNode.insertBefore(this._clone,this.element));if(this.options.scroll)if(this.options.scroll==window){var t=this._getWindowScroll(this.options.scroll);this.originalScrollLeft=t.left,this.originalScrollTop=t.top}else this.originalScrollLeft=this.options.scroll.scrollLeft,this.originalScrollTop=this.options.scroll.scrollTop;Draggables.notify("onStart",this,e),this.options.starteffect&&this.options.starteffect(this.element)},updateDrag:function(event,pointer){this.dragging||this.startDrag(event),this.options.quiet||(Position.prepare(),Droppables.show(pointer,this.element)),Draggables.notify("onDrag",this,event),this.draw(pointer),this.options.change&&this.options.change(this);if(this.options.scroll){this.stopScrolling();var p;if(this.options.scroll==window)with(this._getWindowScroll(this.options.scroll))p=[left,top,left+width,top+height];else p=Position.page(this.options.scroll),p[0]+=this.options.scroll.scrollLeft+Position.deltaX,p[1]+=this.options.scroll.scrollTop+Position.deltaY,p.push(p[0]+this.options.scroll.offsetWidth),p.push(p[1]+this.options.scroll.offsetHeight);var speed=[0,0];pointer[0]<p[0]+this.options.scrollSensitivity&&(speed[0]=pointer[0]-(p[0]+this.options.scrollSensitivity)),pointer[1]<p[1]+this.options.scrollSensitivity&&(speed[1]=pointer[1]-(p[1]+this.options.scrollSensitivity)),pointer[0]>p[2]-this.options.scrollSensitivity&&(speed[0]=pointer[0]-(p[2]-this.options.scrollSensitivity)),pointer[1]>p[3]-this.options.scrollSensitivity&&(speed[1]=pointer[1]-(p[3]-this.options.scrollSensitivity)),this.startScrolling(speed)}Prototype.Browser.WebKit&&window.scrollBy(0,0),Event.stop(event)},finishDrag:function(e,t){this.dragging=!1;if(this.options.quiet){Position.prepare();var n=[Event.pointerX(e),Event.pointerY(e)];Droppables.show(n,this.element)}this.options.ghosting&&(this._originallyAbsolute||Position.relativize(this.element),delete this._originallyAbsolute,Element.remove(this._clone),this._clone=null);var r=!1;t&&(r=Droppables.fire(e,this.element),r||(r=!1)),r&&this.options.onDropped&&this.options.onDropped(this.element),Draggables.notify("onEnd",this,e);var i=this.options.revert;i&&Object.isFunction(i)&&(i=i(this.element));var s=this.currentDelta();i&&this.options.reverteffect?(r==0||i!="failure")&&this.options.reverteffect(this.element,s[1]-this.delta[1],s[0]-this.delta[0]):this.delta=s,this.options.zindex&&(this.element.style.zIndex=this.originalZ),this.options.endeffect&&this.options.endeffect(this.element),Draggables.deactivate(this),Droppables.reset()},keyPress:function(e){if(e.keyCode!=Event.KEY_ESC)return;this.finishDrag(e,!1),Event.stop(e)},endDrag:function(e){if(!this.dragging)return;this.stopScrolling(),this.finishDrag(e,!0),Event.stop(e)},draw:function(e){var t=this.element.cumulativeOffset();if(this.options.ghosting){var n=Position.realOffset(this.element);t[0]+=n[0]-Position.deltaX,t[1]+=n[1]-Position.deltaY}var r=this.currentDelta();t[0]-=r[0],t[1]-=r[1],this.options.scroll&&this.options.scroll!=window&&this._isScrollChild&&(t[0]-=this.options.scroll.scrollLeft-this.originalScrollLeft,t[1]-=this.options.scroll.scrollTop-this.originalScrollTop);var i=[0,1].map(function(n){return e[n]-t[n]-this.offset[n]}.bind(this));this.options.snap&&(Object.isFunction(this.options.snap)?i=this.options.snap(i[0],i[1],this):Object.isArray(this.options.snap)?i=i.map(function(e,t){return(e/this.options.snap[t]).round()*this.options.snap[t]}.bind(this)):i=i.map(function(e){return(e/this.options.snap).round()*this.options.snap}.bind(this)));var s=this.element.style;if(!this.options.constraint||this.options.constraint=="horizontal")s.left=i[0]+"px";if(!this.options.constraint||this.options.constraint=="vertical")s.top=i[1]+"px";s.visibility=="hidden"&&(s.visibility="")},stopScrolling:function(){this.scrollInterval&&(clearInterval(this.scrollInterval),this.scrollInterval=null,Draggables._lastScrollPointer=null)},startScrolling:function(e){if(!e[0]&&!e[1])return;this.scrollSpeed=[e[0]*this.options.scrollSpeed,e[1]*this.options.scrollSpeed],this.lastScrolled=new Date,this.scrollInterval=setInterval(this.scroll.bind(this),10)},scroll:function(){var current=new Date,delta=current-this.lastScrolled;this.lastScrolled=current;if(this.options.scroll==window)with(this._getWindowScroll(this.options.scroll))if(this.scrollSpeed[0]||this.scrollSpeed[1]){var d=delta/1e3;this.options.scroll.scrollTo(left+d*this.scrollSpeed[0],top+d*this.scrollSpeed[1])}else this.options.scroll.scrollLeft+=this.scrollSpeed[0]*delta/1e3,this.options.scroll.scrollTop+=this.scrollSpeed[1]*delta/1e3;Position.prepare(),Droppables.show(Draggables._lastPointer,this.element),Draggables.notify("onDrag",this),this._isScrollChild&&(Draggables._lastScrollPointer=Draggables._lastScrollPointer||$A(Draggables._lastPointer),Draggables._lastScrollPointer[0]+=this.scrollSpeed[0]*delta/1e3,Draggables._lastScrollPointer[1]+=this.scrollSpeed[1]*delta/1e3,Draggables._lastScrollPointer[0]<0&&(Draggables._lastScrollPointer[0]=0),Draggables._lastScrollPointer[1]<0&&(Draggables._lastScrollPointer[1]=0),this.draw(Draggables._lastScrollPointer)),this.options.change&&this.options.change(this)},_getWindowScroll:function(w){var T,L,W,H;with(w.document)w.document.documentElement&&documentElement.scrollTop?(T=documentElement.scrollTop,L=documentElement.scrollLeft):w.document.body&&(T=body.scrollTop,L=body.scrollLeft),w.innerWidth?(W=w.innerWidth,H=w.innerHeight):w.document.documentElement&&documentElement.clientWidth?(W=documentElement.clientWidth,H=documentElement.clientHeight):(W=body.offsetWidth,H=body.offsetHeight);return{top:T,left:L,width:W,height:H}}});Draggable._dragging={};var SortableObserver=Class.create({initialize:function(e,t){this.element=$(e),this.observer=t,this.lastValue=Sortable.serialize(this.element)},onStart:function(){this.lastValue=Sortable.serialize(this.element)},onEnd:function(){Sortable.unmark(),this.lastValue!=Sortable.serialize(this.element)&&this.observer(this.element)}}),Sortable={SERIALIZE_RULE:/^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,sortables:{},_findRootElement:function(e){while(e.tagName.toUpperCase()!="BODY"){if(e.id&&Sortable.sortables[e.id])return e;e=e.parentNode}},options:function(e){e=Sortable._findRootElement($(e));if(!e)return;return Sortable.sortables[e.id]},destroy:function(e){e=$(e);var t=Sortable.sortables[e.id];t&&(Draggables.removeObserver(t.element),t.droppables.each(function(e){Droppables.remove(e)}),t.draggables.invoke("destroy"),delete Sortable.sortables[t.element.id])},create:function(e){e=$(e);var t=Object.extend({element:e,tag:"li",dropOnEmpty:!1,tree:!1,treeTag:"ul",overlap:"vertical",constraint:"vertical",containment:e,handle:!1,only:!1,delay:0,hoverclass:null,ghosting:!1,quiet:!1,scroll:!1,scrollSensitivity:20,scrollSpeed:15,format:this.SERIALIZE_RULE,elements:!1,handles:!1,onChange:Prototype.emptyFunction,onUpdate:Prototype.emptyFunction},arguments[1]||{});this.destroy(e);var n={revert:!0,quiet:t.quiet,scroll:t.scroll,scrollSpeed:t.scrollSpeed,scrollSensitivity:t.scrollSensitivity,delay:t.delay,ghosting:t.ghosting,constraint:t.constraint,handle:t.handle};t.starteffect&&(n.starteffect=t.starteffect),t.reverteffect?n.reverteffect=t.reverteffect:t.ghosting&&(n.reverteffect=function(e){e.style.top=0,e.style.left=0}),t.endeffect&&(n.endeffect=t.endeffect),t.zindex&&(n.zindex=t.zindex);var r={overlap:t.overlap,containment:t.containment,tree:t.tree,hoverclass:t.hoverclass,onHover:Sortable.onHover},i={onHover:Sortable.onEmptyHover,overlap:t.overlap,containment:t.containment,hoverclass:t.hoverclass};Element.cleanWhitespace(e),t.draggables=[],t.droppables=[];if(t.dropOnEmpty||t.tree)Droppables.add(e,i),t.droppables.push(e);(t.elements||this.findElements(e,t)||[]).each(function(i,s){var o=t.handles?$(t.handles[s]):t.handle?$(i).select("."+t.handle)[0]:i;t.draggables.push(new Draggable(i,Object.extend(n,{handle:o}))),Droppables.add(i,r),t.tree&&(i.treeNode=e),t.droppables.push(i)}),t.tree&&(Sortable.findTreeElements(e,t)||[]).each(function(n){Droppables.add(n,i),n.treeNode=e,t.droppables.push(n)}),this.sortables[e.identify()]=t,Draggables.addObserver(new SortableObserver(e,t.onUpdate))},findElements:function(e,t){return Element.findChildren(e,t.only,t.tree?!0:!1,t.tag)},findTreeElements:function(e,t){return Element.findChildren(e,t.only,t.tree?!0:!1,t.treeTag)},onHover:function(e,t,n){if(Element.isParent(t,e))return;if(n>.33&&n<.66&&Sortable.options(t).tree)return;if(n>.5){Sortable.mark(t,"before");if(t.previousSibling!=e){var r=e.parentNode;e.style.visibility="hidden",t.parentNode.insertBefore(e,t),t.parentNode!=r&&Sortable.options(r).onChange(e),Sortable.options(t.parentNode).onChange(e)}}else{Sortable.mark(t,"after");var i=t.nextSibling||null;if(i!=e){var r=e.parentNode;e.style.visibility="hidden",t.parentNode.insertBefore(e,i),t.parentNode!=r&&Sortable.options(r).onChange(e),Sortable.options(t.parentNode).onChange(e)}}},onEmptyHover:function(e,t,n){var r=e.parentNode,i=Sortable.options(t);if(!Element.isParent(t,e)){var s,o=Sortable.findElements(t,{tag:i.tag,only:i.only}),u=null;if(o){var a=Element.offsetSize(t,i.overlap)*(1-n);for(s=0;s<o.length;s+=1){if(!(a-Element.offsetSize(o[s],i.overlap)>=0)){if(a-Element.offsetSize(o[s],i.overlap)/2>=0){u=s+1<o.length?o[s+1]:null;break}u=o[s];break}a-=Element.offsetSize(o[s],i.overlap)}}t.insertBefore(e,u),Sortable.options(r).onChange(e),i.onChange(e)}},unmark:function(){Sortable._marker&&Sortable._marker.hide()},mark:function(e,t){var n=Sortable.options(e.parentNode);if(n&&!n.ghosting)return;Sortable._marker||(Sortable._marker=($("dropmarker")||Element.extend(document.createElement("DIV"))).hide().addClassName("dropmarker").setStyle({position:"absolute"}),document.getElementsByTagName("body").item(0).appendChild(Sortable._marker));var r=e.cumulativeOffset();Sortable._marker.setStyle({left:r[0]+"px",top:r[1]+"px"}),t=="after"&&(n.overlap=="horizontal"?Sortable._marker.setStyle({left:r[0]+e.clientWidth+"px"}):Sortable._marker.setStyle({top:r[1]+e.clientHeight+"px"})),Sortable._marker.show()},_tree:function(e,t,n){var r=Sortable.findElements(e,t)||[];for(var i=0;i<r.length;++i){var s=r[i].id.match(t.format);if(!s)continue;var o={id:encodeURIComponent(s?s[1]:null),element:e,parent:n,children:[],position:n.children.length,container:$(r[i]).down(t.treeTag)};o.container&&this._tree(o.container,t,o),n.children.push(o)}return n},tree:function(e){e=$(e);var t=this.options(e),n=Object.extend({tag:t.tag,treeTag:t.treeTag,only:t.only,name:e.id,format:t.format},arguments[1]||{}),r={id:null,parent:null,children:[],container:e,position:0};return Sortable._tree(e,n,r)},_constructIndex:function(e){var t="";do e.id&&(t="["+e.position+"]"+t);while((e=e.parent)!=null);return t},sequence:function(e){e=$(e);var t=Object.extend(this.options(e),arguments[1]||{});return $(this.findElements(e,t)||[]).map(function(e){return e.id.match(t.format)?e.id.match(t.format)[1]:""})},setSequence:function(e,t){e=$(e);var n=Object.extend(this.options(e),arguments[2]||{}),r={};this.findElements(e,n).each(function(e){e.id.match(n.format)&&(r[e.id.match(n.format)[1]]=[e,e.parentNode]),e.parentNode.removeChild(e)}),t.each(function(e){var t=r[e];t&&(t[1].appendChild(t[0]),delete r[e])})},serialize:function(e){e=$(e);var t=Object.extend(Sortable.options(e),arguments[1]||{}),n=encodeURIComponent(arguments[1]&&arguments[1].name?arguments[1].name:e.id);return t.tree?Sortable.tree(e,arguments[1]).children.map(function(e){return[n+Sortable._constructIndex(e)+"[id]="+encodeURIComponent(e.id)].concat(e.children.map(arguments.callee))}).flatten().join("&"):Sortable.sequence(e,arguments[1]).map(function(e){return n+"[]="+encodeURIComponent(e)}).join("&")}};Element.isParent=function(e,t){return!e.parentNode||e==t?!1:e.parentNode==t?!0:Element.isParent(e.parentNode,t)},Element.findChildren=function(e,t,n,r){if(!e.hasChildNodes())return null;r=r.toUpperCase(),t&&(t=[t].flatten());var i=[];return $A(e.childNodes).each(function(e){e.tagName&&e.tagName.toUpperCase()==r&&(!t||Element.classNames(e).detect(function(e){return t.include(e)}))&&i.push(e);if(n){var s=Element.findChildren(e,t,n,r);s&&i.push(s)}}),i.length>0?i.flatten():[]},Element.offsetSize=function(e,t){return e["offset"+(t=="vertical"||t=="height"?"Height":"Width")]};