function getXMLHttpRequestObject()
{
	if(window.XMLHttpRequest)
		return new XMLHttpRequest();
	else if (window.ActiveXObject)
		return new ActiveXObject("Microsoft.XMLHTTP");
	else
		alert("You cannot display AJAX");
}


function loadResult()
{
	if(fR.readyState == 4)
	{
	}
}
			

function countup()
{
	fR.open('POST', 'menu.php?t='+ new Date().getTime());
	fR.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
	fR.onreadystatechange = loadResult;
	
	fR.send(null);
}

var fR = getXMLHttpRequestObject();