(function(){function style(el,style){var mrg=el.getStyle(style);return mrg=="auto"?0:mrg.toInt();}var Carousel=this.Carousel=new Class({Implements:[Options,Events],options:{mode:"horizontal",animation:"Move",scroll:4,distance:1,fx:{link:"cancel",transition:"sine:out",duration:500}},plugins:{},initialize:function(options){this.addEvent("change",function(current){this.current=current;}.bind(this)).setOptions(options);["previous","next"].each(function(val){if($(this.options[val])){$(this.options[val]).addEvent("click",function(e){e.stop();
this[val]();}.bind(this));}},this);this.elements=$(options.container).getChildren(options.selector);this.current=0;this.anim=new this.plugins[this.options.animation](this);this.move(this.options.current||0);},isVisible:function(index){if($type($(index))=="element"){index=this.elements.indexOf($(index));}var length=this.elements.length,current=this.current,scroll=this.options.scroll;if(current<=index&&index<current+scroll){return true;}if(this.options.circular){for(var i=1;i<scroll;i++){if((i+current)%length==index){return true;
}}}return false;},first:function(){return this.current;},previous:function(direction){return this.move(this.current-this.options.distance,direction);},next:function(direction){return this.move(this.current+this.options.distance,direction);},move:function(index,direction){var elements=this.elements,current=this.current,length=elements.length,scroll=this.options.scroll;if($type($(index))=="element"){index=elements.indexOf($(index));}if(!this.options.circular){if(index>length-scroll){index=length-scroll;
}}else{if(index<0){index+=length;}index%=Math.max(length,1);}if(index<0||length<=scroll||index>=length){return this;}if(direction!=1&&direction!=-1){var forward=current<index?index-current:elements.length-current+index,backward=current>index?current-index:current+elements.length-index;direction=Math.abs(forward)<=Math.abs(backward)?1:-1;}this.anim.move(this,index,direction);return this;}});Carousel.prototype.plugins.Move=new Class({initialize:function(carousel){var up=this.up=carousel.options.mode=="vertical",options=this.options=carousel.options,parent=carousel.elements[0].getParent(),elements=this.elements=carousel.elements;
parent.setStyles({height:parent.offsetHeight,position:"relative",overflow:"hidden"}).getStyle("padding"+(this.up?"Top":"Left"));elements.each(function(el){el.setStyles({display:"block",position:"absolute"});});this.property="offset"+(up?"Top":"Left");this.margin=up?["marginTop","marginBottom"]:["marginLeft","marginRight"];this.reorder(0,1).fx=new Fx.Elements(elements,options.fx);},reorder:function(offset,direction){var options=this.options,panels=this.elements,panel,prev,ini=pos=style(panels[0].getParent(),"padding"+(this.up?"Top":"Left")),i,index,length=panels.length,horizontal=options.mode=="horizontal",side=horizontal?"offsetWidth":"offsetHeight";
if(direction==-1){for(i=length;i>options.scroll-1;i--){index=(i+offset+length)%length;prev=panel;panel=panels[index];if(horizontal){panel.setStyle("left",pos);}else{panel.setStyles({left:0,top:pos});}pos-=(panel[side]+style(panel,this.margin[1]));if(prev){pos-=style(prev,this.margin[0]);}}pos=ini+panel[side]+style(panel,this.margin[0]);for(i=1;i<options.scroll;i++){index=(i+offset+length)%length;prev=panel;panel=panels[index];if(horizontal){panel.setStyle("left",pos);}else{panel.setStyles({left:0,top:pos});
}pos+=panel[side]+style(panel,this.margin[0]);if(prev){pos+=style(prev,this.margin[1]);}}}else{if(direction==1){for(i=0;i<length;i++){index=(i+offset+length)%length;prev=panel;panel=panels[index];if(horizontal){panel.setStyle("left",pos);}else{panel.setStyles({left:0,top:pos});}pos+=panel[side]+style(panel,this.margin[0]);if(prev){pos+=style(prev,this.margin[1]);}}}}return this;},move:function(carousel,current,direction){var obj={},up=this.up,property=this.property,offset;if(this.options.circular){this.reorder(carousel.current,direction);
}offset=carousel.elements[current][property];carousel.elements.each(function(el,index){obj[index]=up?{top:el[property]-offset}:{left:el[property]-offset};});this.fx.cancel().start(obj).chain(function(){carousel.fireEvent("change",current);});}});})();