var request = false;
	function createRequest() {
	  try {
		request = new XMLHttpRequest();
	  } catch (trymicrosoft) {
		try {
		  request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft) {
		  try {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		  } catch (failed) {
			request = false;
		  }
		}
	  }
	  if (!request)
		alert("Error initializing XMLHttpRequest!");
	}