var req = null;
var reqHTML = null;
function loadUrl( url,callfun ) {
	if(window.XMLHttpRequest) {
		try { 
			req = new XMLHttpRequest();
		} catch(e) { 
			req = false; 
		}
	} 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.onreadystatechange = callfun;
		req.open('POST', url, true);
		req.send('');
	}
}