function loadXMLDoc(url) {
	var req = false;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
	if(req) {
		req.open("GET", url, false);
		req.send("");
		return req.responseText;
	} else {
		return "ERROR";
	}
}
function getcities() {
	var cities = document.getElementById('cities');
	cities.innerHTML = "Please wait...";
	setTimeout('getcities2();',100);
}
function getcities2() {
	var cities = document.getElementById('cities');
	try {
		var js = loadXMLDoc('getweather.php?location='+escape(document.getElementById('location').value));
		eval(js);
	} catch(e) {
                setTimeout('getcities2();',500);
                /* cities.innerHTML = "Error: server unavailable, please try later..."; */
	}
}