// JavaScript Document
var request = null;
  try {
	request = new XMLHttpRequest();
  } catch (trymicrosoft){
	  try {
		request = new ActiveXObject("Msxml2.XMLHTTP");
	  } catch (othermicrosoft){
		try {
		  request = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (failed) {
		  request = null;
		}
	  }
	}
  if (request == null){
  	alert("Error creating request object!");
  }