function TabSearch()
        {
           if(event.keyCode == 13)
          { 
           go ();
          } 
        }
function opwin(keywords,type){ 
window.open("/"+type+"/List.asp?action=search&c_id=&sea_type=topic&sea_term=all&keyword="+escape(keywords));
}

function go(){
                var key =  document.getElementById("txtSearch").value;
		     key = key.replace(/</g, "");
	              key = key.replace(/>/g, ""); 
			    var index = document.getElementById("xz").selectedIndex; 
			    var type = document.getElementById("xz").options[index].value; 
               if(key == null || key.length==0)
               {
                  alert("请输入搜索关键字"); 
                  return false;
               }
			     else if(type.indexOf('ft') != -1 && key.length < 2) 
			     {
			       alert("请输入2个或以上字符");
			       return;
			     } 

                opwin(key,type)
       }