var xmlHttp
var xmlHttp2
function showHint(file_name)
{
	
//////////////////////make it global varialble////////////////////
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Browser does not support HTTP Request")
  return
  } 
var url=file_name;
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==1 )
 { 
  		document.getElementById('sub_category').innerHTML="<td valign='top'><center><img src='ajax/loading22.gif' border='0'></center></td>";
 } 
 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
	document.getElementById('sub_category').innerHTML=xmlHttp.responseText;
 } 
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 // Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}