function rotatecontents(objectid){
	this.titleobject=null;
	this.titlesetbyrule=null;
	this.pagingobject=null;
	this.pagingstart='';
	this.pagingdelimiter='/';
	this.pagingend='';
	this.rotatemethod=null;
	this.maxzindex=1;
	this.speed=5;
	this.autoplay=true;
	this.autoplaytime=3;

	this.buttonobject=null;
	this.buttontype='text';
	this.buttononclassname='on';
	this.buttononimagename='';

	this.addtitle=function(title){
		titles.push(title);
	}
	
	var object=document.getElementById(objectid);
	var items=new Array(),itemsnum,titles=new Array();
	var btns=new Array(),btnsmover=new Array(),btnsmout=new Array();
	var speed,timer,nowno=0,canimove=true;
	var isie=(navigator.userAgent.toLowerCase().indexOf('msie')!=-1)? true : false;

	this.initialize=function(){
		var isfirst=true,removeobjs=new Array(),childs=object.childNodes;
		for(var i=0,j=-1,max=childs.length; i<max; i++){
			if(childs[i].nodeType==1){
				j++;
				if(this.titleobject){
					if(this.titlesetbyrule=='alt'){
						titles.push((childs[i].nodeName.toLowerCase()=='img')? childs[i].alt : childs[i].getElementsByTagName('img')[0].alt);
					}else if(this.titlesetbyrule=='nextobject' && j%2){
						titles.push(childs[i].innerHTML);
						removeobjs.push(childs[i]);
						continue;
					}else if(this.titlesetbyrule=='prevobject' && j%2==0){
						titles.push(childs[i].innerHTML);
						removeobjs.push(childs[i]);
						continue;
					}
				}
				if(!isfirst) childs[i].style.display='none';
				items.push(childs[i]);
				if(this.rotatemethod=='overlap' || this.rotatemethod=='slide' || this.rotatemethod=='fadein'){
					speed=this.speed;
					object.style.position='relative';
					with(childs[i].style){
						position='absolute';
						left='0px';
						top='0px';
						width=object.offsetWidth+'px';
					}
					if(this.rotatemethod=='fadein'){
						setopacity(childs[i],(isfirst)? 100 : 0);
					}
				}
				if(isfirst) isfirst=false;
			}
		}
		itemsnum=items.length;
		if(removeobjs[0]){
			for(var i=0,max=removeobjs.length; i<max; i++) object.removeChild(removeobjs[i]);
		}
		if(this.titleobject) this.titleobject=(titles[0])? document.getElementById(this.titleobject) : null;
		if(this.pagingobject) this.pagingobject=document.getElementById(this.pagingobject);
		this.settitlenpaging(nowno);
		object.style.width=object.offsetWidth+'px';
		object.style.height=object.offsetHeight+'px';
		object.style.overflow='hidden';
		object.onmouseover=function(){
			clearTimeout(eval(objectid).autoplaytimer);
		}
		object.onmouseout=function(){
			eval(objectid).autoplayaction();
		}
		if(this.buttonobject){
			this.buttonobject=document.getElementById(this.buttonobject);
			var childs=this.buttonobject.childNodes;
			for(var i=0,j=0,max=childs.length; i<max; i++){
				if(childs[i].nodeType==1){
					childs[i].myno=j;
					if(childs[i].onmouseover) btnsmover.push(childs[i].onmouseover);
					if(childs[i].onmouseout) btnsmout.push(childs[i].onmouseout);
					btns.push(childs[i]);
					j++;
				}
			}
			if(items.length!=btns.length) this.buttonobject=null;
			else this.setbtns();
		}
		this.autoplayaction();
	}

	this.settitlenpaging=function(no){
		if(this.titleobject) this.titleobject.innerHTML=titles[no];
		if(this.pagingobject) this.pagingobject.innerHTML=this.pagingstart+(no+1)+this.pagingdelimiter+itemsnum+this.pagingend;
	}

	this.setzindex=function(no){
		for(var i=0; i<itemsnum; i++){
			if(i==no){
				items[i].style.zIndex=this.maxzindex+3;
				items[i].style.display='';
			}else if(i==nowno){
				items[i].style.zIndex=this.maxzindex+2;
			}else{
				items[i].style.zIndex=this.maxzindex+1;
				items[i].style.display='none';
			}
		}
	}

	this.setbtns=function(no){
		if(!no && no!==0) no=nowno;
		for(var i=0; i<itemsnum; i++){
			if(i==no){
				this.setbtnon(btns[i]);
				btns[i].onmouseover=null;
				btns[i].onmouseout=null;
			}else{
				this.setbtnoff(btns[i]);
				btns[i].onmouseover=function(){
					eval(objectid).setbtnon(this);
					if(btnsmover[this.myno]) btnsmover[this.myno]();
				}
				btns[i].onmouseout=function(){
					eval(objectid).setbtnoff(this);
					if(btnsmout[this.myno]) btnsmout[this.myno]();
				}
			}
		}
	}

	this.setbtnon=function(target){
		var classes,exist=false;
		if(this.buttontype=='image'){
			var btnimg=target.getElementsByTagName('img')[0];
			var btnimgexp=btnimg.src.substring(btnimg.src.lastIndexOf('.'));
			if(btnimg.src.indexOf(this.buttononimagename+btnimgexp)==-1) btnimg.src=btnimg.src.replace(btnimgexp,this.buttononimagename+btnimgexp);
		}
		classes=target.className.split(' ');
		for(var i=0; i<classes.length; i++) if(classes[i]==this.buttononclassname) exist=true;
		if(!exist) target.className=target.className+' '+this.buttononclassname;
	}

	this.setbtnoff=function(target){
		var classes;
		if(this.buttontype=='image'){
			var btnimg=target.getElementsByTagName('img')[0];
			var btnimgexp=btnimg.src.substring(btnimg.src.lastIndexOf('.'));
			if(btnimg.src.indexOf(this.buttononimagename+btnimgexp)!=-1) btnimg.src=btnimg.src.replace(this.buttononimagename+btnimgexp,btnimgexp);
		}
		if(target.className.indexOf(this.buttononclassname)!=-1){
			if(target.className.indexOf(' ')==-1) target.className=target.className.replace(this.buttononclassname,'');
			else{
				classes=target.className.split(' ');
				for(var i=0; i<classes.length; i++) if(classes[i]==this.buttononclassname) classes[i]='';
				target.className=classes.join(' ');
			}
		}
	}

	this.change=function(no){
		no=no-1;
		if(no!=nowno){
			if(this.rotatemethod=='overlap') this.moveaction('overlap',no,(no<nowno)? 'prev' : 'next');
			else if(this.rotatemethod=='slide') this.moveaction('slide',no,(no<nowno)? 'prev' : 'next');
			else if(this.rotatemethod=='fadein') this.fadeinaction(no);
			else this.hideitem(no);
			this.settitlenpaging(no);
			if(this.buttonobject) this.setbtns(no);
		}
	}

	this.prev=function(){
		var prevno=(nowno==0)? itemsnum-1 : nowno-1;
		if(this.rotatemethod=='overlap') this.moveaction('overlap',prevno,'prev');
		else if(this.rotatemethod=='slide') this.moveaction('slide',prevno,'prev');
		else if(this.rotatemethod=='fadein') this.fadeinaction(prevno);
		else this.hideitem(prevno);
		this.settitlenpaging(prevno);
		if(this.buttonobject) this.setbtns(prevno);
	}

	this.next=function(){
		var nextno=(nowno==(itemsnum-1))? 0 : nowno+1;
		if(this.rotatemethod=='overlap') this.moveaction('overlap',nextno,'next');
		else if(this.rotatemethod=='slide') this.moveaction('slide',nextno,'next');
		else if(this.rotatemethod=='fadein') this.fadeinaction(nextno);
		else this.hideitem(nextno);
		this.settitlenpaging(nextno);
		if(this.buttonobject) this.setbtns(nextno);
	}

	this.autoplaytimer=null;
	this.autoplayaction=function(){
		if(!this.autoplay) return;
		this.autoplaytimer=setTimeout(objectid+'.next()',this.autoplaytime*1000);
	}

	this.hideitem=function(no){
		clearTimeout(this.autoplaytimer);
		for(var i=0; i<itemsnum; i++) items[i].style.display=(i==no)? '' : 'none';
		this.autoplayaction();
		nowno=no;
	}

	var getleft=function(no){
		return parseInt(items[no].style.left);
	}

	var setleft=function(no,value){
		items[no].style.left=value+'px';
	}

	this.moveaction=function(method,no,direction){
		clearTimeout(this.autoplaytimer);
		if(canimove){
			canimove=false;
			setleft(no,(direction=='prev')? -(object.offsetWidth) : object.offsetWidth);
			this.setzindex(no);
			var now,snow,to=0,mv=0;
			var action=function(){
				clearTimeout(timer);
				now=getleft(no);
				if(method=='slide') snow=getleft(nowno);
				if(now!=to){
					mv=(now-to)/speed;
					setleft(no,(direction=='prev')? Math.ceil(now-mv) : Math.floor(now-mv));
					if(method=='slide') setleft(nowno,(direction=='prev')? Math.ceil(snow-mv) : Math.floor(snow-mv));
					setTimeout(action,10);
				}else{
					eval(objectid+'.autoplayaction()');
					clearTimeout(timer);
					canimove=true;
					nowno=no;
				}
			}
			action();
		}
	}

	var getopacity=function(target){
		return (isie)? parseInt(target.style.filter.match(/alpha\(opacity=([0-9]+)\)/)[1]) : target.style.opacity*100;
	}

	var setopacity=function(target,value){
		if(isie) target.style.filter='alpha(opacity='+value+')';
		else target.style.opacity=value/100;
	}

	this.fadeinaction=function(no){
		clearTimeout(this.autoplaytimer);
		if(canimove){
			canimove=false;
			setopacity(items[no],0);
			this.setzindex(no);
			var nowo,to=0;
			var action=function(){
				clearTimeout(timer);
				nowo=getopacity(items[no]);
				if(nowo!=100){
					setopacity(items[no],Math.ceil(nowo+(100-nowo)/speed));
					setTimeout(action,10);
				}else{
					eval(objectid+'.autoplayaction()');
					clearTimeout(timer);
					canimove=true;
					nowno=no;
				}
			}
			action();
		}
	}

}