var snum=1; //初始化显示的图片		
		var sec=2300; //切换图片的速度
		var pic_id;
		var icefable =document.getElementById("icefable")
	    var items =icefable.getElementsByTagName("a");
		var best_num=icefable.getElementsByTagName("a").length; //图片的数量
		function SelectShow(v){
			var i;
			for(i=1;i<=best_num;i++){
				eval("document.getElementById(\"big_pic"+i+"\").style.display=\"none\"");
				
				eval("items[i].className=\"\"");
			}
			document.getElementById("big_pic"+v).style.display="";	
			SetNum(v+1);
			clearTimeout(pic_id);
			pic_id = setTimeout("SelectShow(snum)",sec);
		}
		function SetNum(v){
			snum=v;
			if(snum>best_num) snum=1;
		}

		pic_id = setTimeout("SelectShow(snum)",sec);