function ajaxFunction()
{
var xmlHttp;
try
  {
  // Firefox, Opera 8.0+, Safari
  	return new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    	return new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    try
      {
       return new ActiveXObject("Microsoft.XMLHTTP");
      }
    catch (e)
      {
      alert("Your browser does not support AJAX!");
      return false;
      }
    }
  }
  }