function getXMLHttpRequest () {
	
	try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) {};
	try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {};
	try { return new XMLHttpRequest(); } catch(e) {};
    return null;
}

function track(trackId) {
	
	var asyncRequest = getXMLHttpRequest();
	asyncRequest.open("GET", "/ajax/count.php?trackId=" + trackId, true);
	asyncRequest.send(null);
	
}