var tPulse = setTimeout('SendPulse()', 300000);

function SendPulse()
{
	var currentTime = new Date()
	var DateTime = currentTime.getTime();
	xmlhttp = CreateXMLHttp();

	if (xmlhttp)
	{
		var sTargetURL = './contacts/fetch_pulse.php';
		var sURL = sTargetURL + "?SID=" + sSID + "&Now=" + DateTime;

		xmlhttp.open("GET", sURL, false);
		xmlhttp.send(null);

		if (xmlhttp.readyState==4)
		{
			var oDiv = document.getElementById('pulse');
			oDiv.innerHTML = xmlhttp.responseText;
		}
	}
	tPulse = setTimeout('SendPulse()', 300000);
}