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