function createRequest() {
	  	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!");
	   	} else {
		   	return request;
	   	}
  	}