Element.Class={toggle:function(element,className){if(Element.Class.has(element,className)){Element.Class.remove(element,className);if(arguments.length==3)Element.Class.add(element,arguments[2]);}else{Element.Class.add(element,className);if(arguments.length==3)Element.Class.remove(element,arguments[2]);}},get:function(element){element=$(element);return element.className.split(' ');},remove:function(element){element=$(element);var regEx;for(var i=1;i<arguments.length;i++){regEx=new RegExp("^"+arguments[i]+"\\b\\s*|\\s*\\b"+arguments[i]+"\\b",'g');element.className=element.className.replace(regEx,'')}},add:function(element){element=$(element);for(var i=1;i<arguments.length;i++){Element.Class.remove(element,arguments[i]);element.className+=(element.className.length>0?' ':'')+arguments[i];}},has:function(element){element=$(element);if(!element|| !element.className)return false;var regEx;for(var i=1;i<arguments.length;i++){regEx=new RegExp("\\b"+arguments[i]+"\\b");if(!regEx.test(element.className))return false;}return true;},has_any:function(element){element=$(element);if(!element|| !element.className)return false;var regEx;for(var i=1;i<arguments.length;i++){if((typeof arguments[i]=='object')&&(arguments[i].constructor==Array)){for(var j=0;j<arguments[i].length;j++){regEx=new RegExp("\\b"+arguments[i][j]+"\\b");if(regEx.test(element.className))return true;}}else{regEx=new RegExp("\\b"+arguments[i]+"\\b");if(regEx.test(element.className))return true;}}return false;},childrenWith:function(element,className){var children=$(element).getElementsByTagName('*');var elements=new Array();for(var i=0;i<children.length;i++){if(Element.Class.has(children[i],className)){elements.push(children[i]);break;}}return elements;}};var Droppables={drops:false,remove:function(element){for(var i=0;i<this.drops.length;i++)if(this.drops[i].element==element)this.drops.splice(i,1);},add:function(element){var element=$(element);var options=Object.extend({greedy:true,hoverclass:null},arguments[1]||{});if(options.containment){options._containers=new Array();var containment=options.containment;if((typeof containment=='object')&&(containment.constructor==Array)){for(var i=0;i<containment.length;i++)options._containers.push($(containment[i]));}else{options._containers.push($(containment));}options._containers_length=options._containers.length-1;}Element.makePositioned(element);options.element=element;if(!this.drops)this.drops=[];this.drops.push(options);},is_contained:function(element,drop){var containers=drop._containers;var parentNode=element.parentNode;var i=drop._containers_length;do{if(parentNode==containers[i])return true;}while(i--);return false;},is_affected:function(pX,pY,element,drop){return((drop.element!=element)&&((!drop._containers)||this.is_contained(element,drop))&&((!drop.accept)||(Element.Class.has_any(element,drop.accept)))&&Position.within(drop.element,pX,pY));},deactivate:function(drop){Element.Class.remove(drop.element,drop.hoverclass);this.last_active=null;},activate:function(drop){if(this.last_active)this.deactivate(this.last_active);if(drop.hoverclass){Element.Class.add(drop.element,drop.hoverclass);this.last_active=drop;}},show:function(event,element){if(!this.drops)return;var pX=Event.pointerX(event);var pY=Event.pointerY(event);Position.prepare();var i=this.drops.length-1;do{var drop=this.drops[i];if(this.is_affected(pX,pY,element,drop)){if(drop.onHover)drop.onHover(element,drop.element,Position.overlap(drop.overlap,drop.element));if(drop.greedy){this.activate(drop);return;}}}while(i--);},fire:function(event,element){if(!this.last_active)return;Position.prepare();if(this.is_affected(Event.pointerX(event),Event.pointerY(event),element,this.last_active))if(this.last_active.onDrop)this.last_active.onDrop(element,this.last_active);},reset:function(){if(this.last_active)this.deactivate(this.last_active);}};Draggables={observers:new Array(),addObserver:function(observer){this.observers.push(observer);},removeObserver:function(element){for(var i=0;i<this.observers.length;i++)if(this.observers[i].element&&(this.observers[i].element==element))this.observers.splice(i,1);},notify:function(eventName,draggable){for(var i=0;i<this.observers.length;i++)this.observers[i][eventName](draggable);}};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){new Effect.MoveBy(element,-top_offset,-left_offset,{duration:0.4});},endeffect:function(element){new Effect.Opacity(element,{duration:0.2,from:0.7,to:1.0});},zindex:1000,revert:false},arguments[1]||{});this.element=$(element);this.handle=options.handle?$(options.handle):this.element;Element.makePositioned(this.element);this.offsetX=0;this.offsetY=0;this.originalLeft=this.currentLeft();this.originalTop=this.currentTop();this.originalX=this.element.offsetLeft;this.originalY=this.element.offsetTop;this.originalZ=parseInt(this.element.style.zIndex||"0");this.options=options;this.active=false;this.dragging=false;this.eventMouseDown=this.startDrag.bindAsEventListener(this);this.eventMouseUp=this.endDrag.bindAsEventListener(this);this.eventMouseMove=this.update.bindAsEventListener(this);this.eventKeypress=this.keyPress.bindAsEventListener(this);Event.observe(this.handle,"mousedown",this.eventMouseDown);Event.observe(document,"mouseup",this.eventMouseUp);Event.observe(document,"mousemove",this.eventMouseMove);Event.observe(document,"keypress",this.eventKeypress);},destroy:function(){Event.stopObserving(this.handle,"mousedown",this.eventMouseDown);Event.stopObserving(document,"mouseup",this.eventMouseUp);Event.stopObserving(document,"mousemove",this.eventMouseMove);Event.stopObserving(document,"keypress",this.eventKeypress);},currentLeft:function(){return parseInt(this.element.style.left||'0');},currentTop:function(){return parseInt(this.element.style.top||'0')},startDrag:function(event){if(Event.isLeftClick(event)){this.active=true;var style=this.element.style;this.originalY=this.element.offsetTop-this.currentTop()-this.originalTop;this.originalX=this.element.offsetLeft-this.currentLeft()-this.originalLeft;this.offsetY=event.clientY-this.originalY-this.originalTop;this.offsetX=event.clientX-this.originalX-this.originalLeft;Event.stop(event);}},finishDrag:function(event,success){this.active=false;this.dragging=false;if(success)Droppables.fire(event,this.element);Draggables.notify('onEnd',this);var revert=this.options.revert;if(revert&&typeof revert=='function')revert=revert(this.element);if(revert&&this.options.reverteffect){this.options.reverteffect(this.element,this.currentTop()-this.originalTop,this.currentLeft()-this.originalLeft);}else{this.originalLeft=this.currentLeft();this.originalTop=this.currentTop();}this.element.style.zIndex=this.originalZ;if(this.options.endeffect)this.options.endeffect(this.element);Droppables.reset();},keyPress:function(event){if(this.active){if(event.keyCode==Event.KEY_ESC){this.finishDrag(event,false);Event.stop(event);}}},endDrag:function(event){if(this.active&&this.dragging){this.finishDrag(event,true);Event.stop(event);}this.active=false;this.dragging=false;},draw:function(event){var style=this.element.style;this.originalX=this.element.offsetLeft-this.currentLeft()-this.originalLeft;this.originalY=this.element.offsetTop-this.currentTop()-this.originalTop;if((!this.options.constraint)||(this.options.constraint=='horizontal'))style.left=((event.clientX-this.originalX)-this.offsetX)+"px";if((!this.options.constraint)||(this.options.constraint=='vertical'))style.top=((event.clientY-this.originalY)-this.offsetY)+"px";if(style.visibility=="hidden")style.visibility="";},update:function(event){if(this.active){if(!this.dragging){var style=this.element.style;this.dragging=true;if(style.position=="")style.position="relative";style.zIndex=this.options.zindex;Draggables.notify('onStart',this);if(this.options.starteffect)this.options.starteffect(this.element);}Droppables.show(event,this.element);this.draw(event);if(this.options.change)this.options.change(this);if(navigator.appVersion.indexOf('AppleWebKit')>0)window.scrollBy(0,0);Event.stop(event);}}};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(){if(this.lastValue!=Sortable.serialize(this.element))this.observer(this.element)}};Sortable={sortables:new Array(),options:function(element){var element=$(element);for(var i=0;i<this.sortables.length;i++)if(this.sortables[i].element==element)return this.sortables[i];return null;},destroy:function(element){var element=$(element);for(var i=0;i<this.sortables.length;i++){if(this.sortables[i].element==element){var s=this.sortables[i];Draggables.removeObserver(s.element);for(var j=0;j<s.droppables.length;j++)Droppables.remove(s.droppables[j]);for(var j=0;j<s.draggables.length;j++)s.draggables[j].destroy();this.sortables.splice(i,1);}}},create:function(element){var element=$(element);var options=Object.extend({element:element,tag:'li',overlap:'vertical',constraint:'vertical',containment:element,handle:false,only:false,hoverclass:null,onChange:function(){},onUpdate:function(){}},arguments[1]||{});this.destroy(element);var options_for_draggable={revert:true,constraint:options.constraint,handle:handle};if(options.starteffect)options_for_draggable.starteffect=options.starteffect;if(options.reverteffect)options_for_draggable.reverteffect=options.reverteffect;if(options.endeffect)options_for_draggable.endeffect=options.endeffect;if(options.zindex)options_for_draggable.zindex=options.zindex;var options_for_droppable={overlap:options.overlap,containment:options.containment,hoverclass:options.hoverclass,onHover:function(element,dropon,overlap){if(overlap>0.5){if(dropon.previousSibling!=element){var oldParentNode=element.parentNode;element.style.visibility="hidden";dropon.parentNode.insertBefore(element,dropon);if(dropon.parentNode!=oldParentNode&&oldParentNode.sortable)oldParentNode.sortable.onChange(element);if(dropon.parentNode.sortable)dropon.parentNode.sortable.onChange(element);}}else{var nextElement=dropon.nextSibling||null;if(nextElement!=element){var oldParentNode=element.parentNode;element.style.visibility="hidden";dropon.parentNode.insertBefore(element,nextElement);if(dropon.parentNode!=oldParentNode&&oldParentNode.sortable)oldParentNode.sortable.onChange(element);if(dropon.parentNode.sortable)dropon.parentNode.sortable.onChange(element);}}}};Element.cleanWhitespace(element);options.draggables=[];options.droppables=[];var elements=element.childNodes;for(var i=0;i<elements.length;i++)if(elements[i].tagName&&elements[i].tagName==options.tag.toUpperCase()&&(!options.only||(Element.Class.has(elements[i],options.only)))){var handle=options.handle?Element.Class.childrenWith(elements[i],options.handle)[0]:elements[i];options.draggables.push(new Draggable(elements[i],Object.extend(options_for_draggable,{handle:handle})));Droppables.add(elements[i],options_for_droppable);options.droppables.push(elements[i]);}this.sortables.push(options);Draggables.addObserver(new SortableObserver(element,options.onUpdate));},serialize:function(element){var element=$(element);var sortableOptions=this.options(element);var options=Object.extend({tag:sortableOptions.tag,only:sortableOptions.only,name:element.id},arguments[1]||{});var items=$(element).childNodes;var queryComponents=new Array();for(var i=0;i<items.length;i++)if(items[i].tagName&&items[i].tagName==options.tag.toUpperCase()&&(!options.only||(Element.Class.has(items[i],options.only))))queryComponents.push(encodeURIComponent(options.name)+"[]="+encodeURIComponent(items[i].id.split("_")[1]));return queryComponents.join("&");}}