// ##### Read the marker data from the marker xml file ####
// ##### The xmlDoc object should be available globally ####

	var xmlDoc;
	var request = GXmlHttp.create();
	request.open("GET", "markers.xml", true);

	//alert ("readyStateChange:" + request.readyState);

	request.onreadystatechange = function() {


		if (request.readyState == 4) {

			//alert ("readyState = 4");
			xmlDoc = request.responseXML;


		}  

	} 

	request.send(null);