var request = null;
function CreateRequest()
{
	try
	{
		request = new XMLHttpRequest();
	}
catch (e)
  {
  // Internet Explorer
  try
    {
    request=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    try
      {
      request=new ActiveXObject("Microsoft.XMLHTTP");
      }
    catch (e)
      {
      alert("Your browser does not support AJAX!");
      return false;
      }
    }
  }
  
  if(request == null)
	{
		alert("Error While creating request object !!! ");
		return false;
	}

}