function focusimg(bigdiv,smalldiv,titlediv,imgw,imgh,imglist,stime,introdiv)
{
	var $=function (obj){return document.getelementbyid(obj);}
	this.bigdiv=bigdiv;this.smalldiv=smalldiv,this.imgw=imgw;this.imgh=imgh;
	this.imglist=[];
	this.stime=stime;
	this.titlediv=titlediv;
	this.introdiv=introdiv;
	var scrolldiv;
	var smallimglist=[];
	var imgheight,_bigdiv;
	var timer,autotimer;
	var ctitle;
	var t=this;
	var cintro;
	this.curid=0;
	var smallpicarr=[];
	var mypic=document.createelement("img");
	var mypiclink=document.createelement("a");
	this.init=function()//鍒濆鍖?
	{						
		mypic.width=this.imgw;
		mypic.height=this.imgh;
		imgheight=this.imgh;
		_bigdiv=this.bigdiv;
		_titlediv=this.titlediv;
		_introdiv=this.introdiv;
		_imglist=this.imglist;
		scrolldiv=document.createelement("div");
		mypiclink.target="_blank";
		mypiclink.appendchild(mypic);
		scrolldiv.appendchild(mypiclink);
 
		for ( var i = 0; i < this.imglist.length ; i++ )
		{
 
			//鍒涘缓灏忓浘鍖哄煙
			var slspan=document.createelement("div");
			slspan.classname="small_div";
			var slimglink=document.createelement("a");
			slimglink.target="_blank";
			slimglink.href=this.imglist[i].url;
			var slimg=document.createelement("img");
			slimg.src=this.imglist[i].bigimg;
			slimglink.appendchild(slimg);
			slimglink.innerhtml += this.imglist[i].intro;
			slspan.appendchild(slimglink);
			smallpicarr.push(slspan);
			(function(){
				var itemid=i;				
				slspan.onmouseover=function()
				{
					t.dopic(itemid);
					t.curid=itemid;
					clearinterval(autotimer);
					t.autoplay();
				}
 
			})();
			$(this.smalldiv).appendchild(slspan);
 
		}
		$(this.bigdiv).style.width=this.imgw+"px";
		$(this.bigdiv).style.height=this.imgh+"px";
		$(this.bigdiv).style.overflow="hidden";
		$(this.bigdiv).appendchild(scrolldiv);
		this.dopic(0);
 
	};
	this.dopic=function(id)
	{		
		try{cleartimeout(timer)}catch(e){};
		$(this.titlediv).innerhtml=this.imglist[id].title;
		if ($(this.introdiv) && this.imglist[id].intro)
			$(this.introdiv).innerhtml=this.imglist[id].intro ;
		else if($(this.introdiv) || (!this.imglist[id].intro))
			$(this.introdiv).innerhtml="";
		//animate($(this.bigdiv).scrolltop,id * imgheight);
		mypiclink.href=this.imglist[id].url;
		if (document.all)
		{
			mypic.filters.revealtrans.transition=23;
			mypic.filters.revealtrans.apply();
			mypic.filters.revealtrans.play();
		}
		mypic.src=this.imglist[id].bigimg;
		//灏忓浘鍖哄煙鐗规晥
		for (i = 0; i < smallpicarr.length ; i++ )
		{
			smallpicarr[i].classname = smallpicarr[i].classname.replace("selected" , "");
		}
		smallpicarr[id].classname += " selected";
	}
	this.autoplay=function()
	{
		autotimer=setinterval(function(){
			t.curid++;
			if (t.curid >= t.imglist.length)
			  t.curid = 0 ;
			t.dopic(t.curid);
		},this.stime);
	}
	function callback(v)
	{
		$(_bigdiv).scrolltop = v;
	}
	function animate(beginv,endv)
	{
		x = endv - beginv;
		beginv += (x/4);
		if (math.abs(beginv-endv) <= 1)
		{
			beginv = endv ;
			callback(endv);
		}
		else
		{			
			callback(beginv);
			timer=settimeout(function(){animate( beginv  , endv)},10);
		}
	}
}