function logActivity()
{

	var date = new Date();
	var url = "logActivity.php";
	var params = "&t="+date.getSeconds();
    xmlhttp=GetXmlHttpObject();
	xmlhttp.open("GET", url+"?"+params, true);
	xmlhttp.onreadystatechange = function() 
	{
		//Call a function when the state changes.
		if(xmlhttp.readyState == 4 && xmlhttp.status == 200) 
		{

		}
	}
	xmlhttp.send(null);		
}