function keepalive()
{  
	if (window.XMLHttpRequest)
	{
		verzoek2= new XMLHttpRequest();
		if (verzoek2.overrideMimeType) 
		{
			verzoek2.overrideMimeType('text/xml');
		}
	} 
	else if (window.ActiveXObject) 
	{
		try { verzoek2= new ActiveXObject("Msxml2.XMLHTTP"); }
		catch (e) { try { verzoek2= new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {} 	}
	}
	
	verzoek2.onreadystatechange = function()
	{ 
		if(verzoek2.readyState == 4)
		{
			if(verzoek2.status == 200)
			{
				if (verzoek2.responseText=="OK")
				{
					setTimeout("keepalive()",600000);
				}
			}	
		} 
	}

	
	url="keepalive/AJAX_keepalive.php?dnc="+Math.random();
	verzoek2.open("POST", url, true); 
	verzoek2.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
	verzoek2.send(null); 
}   

setTimeout("keepalive()",600000);