function ping()
	{
		var request = getHTTPObject();
		url = "ajax2/ping.php?" + Math.random();
		request.open("GET", url, true);
		request.onreadystatechange = function ()
		{
			if (request.readyState == 4)
			{
				// AJAX har returnerat ett innehåll
			}
		}
		request.send(null);

		window.setTimeout("ping()", 300000);
	}

	window.setTimeout("ping()", 300000);