function $_efu(s){
	if(document.getElementById){
		return document.getElementById(s);
	}
	else{
		return document.all[s];
	}
}
function navChange(liid,tname,num,cid)
{		
		var cnum = cid + num;
		var n=0;
		var navlist = $_efu(liid).getElementsByTagName("li");
		//var navlist = $(liid).childNodes;
			for(var i=n;i<navlist.length;i++)
			{	
				var ccid = cid+i;
				if(navlist[i].className=="img_b0"+i){
				navlist[i].className="img0"+i;
				}
				$_efu(ccid).style.display = "none";
			}
		navlist[num].className = tname;
		$_efu(cnum).style.display = "";
}