function setTab(id,n){
  var tli=document.getElementById(id).getElementsByTagName("li");
    for(i=0;i<tli.length;i++)
    {
       if(n == tli[i].id)
        {
         tli[i].className = "tab_selected";
         var s = n.split("_")[0];
         var div = document.getElementById(s+"_div");
         div.style.display = "";
        }else
        {   
           if(i==tli.length -1)
           {
            tli[i].className ="tab_default last";
           }else
           {
             tli[i].className ="tab_default";
           }               
           var s =  tli[i].id.split("_")[0];
           var div = document.getElementById(s+"_div");
           div.style.display = "none";
        }
    } 
}




function KeyDown(evt,elementID)
{
    evt = evt ? evt : (window.event ? window.event : null);
    var keyCode = evt.keyCode || evt.which || evt.charCode;
    if (keyCode == 13)
    {
        evt.returnValue=false;
        evt.cancel = true;
        document.getElementById(elementID).click();
        return false;
    }
}
function googlesearch()
{
    var searchitem = document.getElementById("searchbox");
    var search = searchitem.value;   
    if(search == "")
    {
        alert("请填写搜索内容！");
    }else
    {
      var url = "http://www.tongcn.net/search.aspx?query="+escape(search);
      window.open(url);
    }
}