function refresh()
{
	setTimeout ( "refresh()", 300000 ); // 600000
  
	url="script/refresh.aspx";
		
	// code for IE7+, Firefox, Chrome, Opera, Safari
	if (window.XMLHttpRequest) xmlhttp=new XMLHttpRequest();
	// code for IE6, IE5
	else xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	
	xmlhttp.onreadystatechange=response;
	
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
}

function response()
{
	if(xmlhttp.readyState==4)
	{
		var response = xmlhttp.responseText;
	}
}