Index: branches/unlabeled/unlabeled-1.10.2/admin/head.php
===================================================================
diff -u -r3946 -r3962
--- branches/unlabeled/unlabeled-1.10.2/admin/head.php	(.../head.php)	(revision 3946)
+++ branches/unlabeled/unlabeled-1.10.2/admin/head.php	(.../head.php)	(revision 3962)
@@ -40,7 +40,7 @@
 		if ($use_xml) {
 	?>
 	<script language="javascript" type="text/javascript">
-        function getXMLHTTPObject()
+		function getXMLHTTPObject()
         {
         	var http_request = false;
 	        if (window.XMLHttpRequest) { // Mozilla, Safari,...
@@ -62,11 +62,14 @@
         }
 
         function processResponce(http_request) {
-	        if (http_request.readyState == 4) {
-	            if (http_request.status == 200) {
+			if (http_request.readyState == 4) {
+	        	// complete
+	        	if (http_request.status == 200) {
 	                document.getElementById('server_status').innerHTML = http_request.responseText;
+	                http_request = null;
+//		                alert('responce: ['+http_request.responseText+']');
 	            } else {
-	//				alert('There was a problem with the request.');
+//						alert('There was a problem with the request.');
 	            }
 	        }
 
@@ -122,11 +125,12 @@
 	?>
 	<script language="javascript" type="text/javascript">
 		function checkServer() {
-			var http_request = getXMLHTTPObject();
-			http_request.onreadystatechange = function() { processResponce(http_request); };
+			$http_request = getXMLHTTPObject();
+			$http_request.onreadystatechange = function() { processResponce($http_request); };
 
-			http_request.open('GET', '<?php echo $xmlhttp_url; ?>', true);
-        	http_request.send(null);
+			$http_request.open('GET', '<?php echo $xmlhttp_url; ?>', true);
+			$http_request.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
+        	$http_request.send(null);
 
         	setTimeout('checkServer()', 5 * 60000);	// one time in 5 minutes
         }