function showHint(str)
{   
document.getElementById("txtHint").innerHTML="<br><br><br><br><center style='color:#902771'>Loading...</center><br><br><br><br><br><br><br><br><br><br><br><br><br><br>";
if (str.length==0)
  { 
  document.getElementById("txtHint").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {  
 
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }
  }

xmlhttp.open("GET","../_ajax/gethint.php?goto="+str,true);
//xmlhttp.open("GET","../_ajax/ajax_info.txt",true);
xmlhttp.send();
}