var xmlHttp
function showHint(str)  {  if (str.length==0)    {    document.getElementById("txtHint").innerHTML="";    return;    }  xmlHttp=GetXmlHttpObject();  if (xmlHttp==null)    {    alert ("Your browser does not support AJAX!");    return;    }  var url="rate.cgi";  url=url+"?ev="+str;  url=url+"&sid="+Math.random();  xmlHttp.onreadystatechange=stateChanged;  xmlHttp.open("GET",url,true);  xmlHttp.send(null);  }    function stateChanged()  {  if (xmlHttp.readyState==4)  {  document.getElementById("txtHint").innerHTML=xmlHttp.responseText;  }  }    function GetXmlHttpObject()  {  var xmlHttp=null;  try    {    xmlHttp=new XMLHttpRequest();    }  catch (e)    {    try      {      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");      }    catch (e)      {      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");      }    }  return xmlHttp;  }