function navChange(liid,tname,num,cid)
   {
   	var cnum = cid + num;
   	var n=0;
   	var navlist = gd(liid).getElementsByTagName("a");
   	//var navlist = $(liid).childNodes;
   	for(var i=n;i<navlist.length;i++)
   	{
   		var ccid = cid+(i+1);
   		navlist[i].className = "tzbtli1";
   		gd(ccid).style.display = "none";
  	}
   	num=num-1;
   	navlist[num].className = tname;
   	gd(cnum).style.display = "";
   }
   function gd(id) {
   	if (document.getElementById && document.getElementById(id)) {
  		return document.getElementById(id);
   	} else if (document.all && document.all[id]) {
   		return document.all[id];
   	} else if (document.layers && document.layers[id]) {
   		return document.layers[id];
   	} else {
  		return null;
   	}
   }
   	var fid='';
	var iid='';
	var content='';