function setActivity(t, c, m, a) {
// Note: a unique timestamp is used for each transaction to force the
// browser history to change (otherwise the result would come from cache)

	ts = new Date();
	unique = ts.getTime();

// Most browsers will provide one or the other of these objects
// These two objects offer the same methods and attributes

	if (window.XMLHttpRequest) {
		req2 = new XMLHttpRequest();
		}
	else
	if (window.ActiveXObject) {
		req2 = new ActiveXObject("Microsoft.XMLHTTP");
		}
	else {
		alert('Your PC can not do this.  Contact Aviongoo for details.');
		}

	BaseURL = 'http://www.aviongoo.com/aviongoo/account/experts/set_activity.php';
	Backend = BaseURL + '?t=' + t + '&m=' + m + '&a=' + a + '&unique=' + unique;

	req2.open("GET", Backend , true);
	req2.onreadystatechange = ActChange;
	req2.send(null);
	}

function ActChange() {
	if(req2.readyState == 4) {
		document.getElementById('status').innerHTML = req2.responseText;
		}
	}