Index: trunk/admin/head.php
===================================================================
diff -u -r3907 -r3983
--- trunk/admin/head.php	(.../head.php)	(revision 3907)
+++ trunk/admin/head.php	(.../head.php)	(revision 3983)
@@ -1,7 +1,7 @@
 <?php
 	define('DBG_SHOW_MEMORY_USAGE', 0);
 	define('DBG_SKIP_REPORTING', 1);
-	
+
 	define('ADMIN', 1);
 	define('REL_PATH', 'admin');
 	$relation_level = count( explode('/', REL_PATH) );
@@ -16,17 +16,17 @@
 		echo 'PING: '.date('d/m/Y H:i:s');
 		exit;
 	}
-	
-	
+
+
 	$user = $application->recallObject('u');
 	$loginname = ($user->GetID() != -1) ? $user->GetDBField('Login') : 'root';
-	
+
 	$logout = $application->HREF('', '', Array('logout' => 1, '__URLENCODE__' => 1), 'index.php');
 	$mainpage = $application->HREF('', '', Array('section' => 'in-portal:root', '__URLENCODE__' => 1), 'subitems.php');
 	$xmlhttp_url = $application->HREF('', '', Array('check_server' => 1, '__URLENCODE__' => 1));
-	
+
 	$language =& $application->recallObject('lang.current');
-	
+
 	$use_xml = $application->isDebugMode() && dbg_ConstOn('DBG_SHOW_EXPIRATION');
 ?>
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
@@ -40,7 +40,7 @@
 		if ($use_xml) {
 	?>
 	<script language="javascript" type="text/javascript">
-        function getXMLHTTPObject()
+		function getXMLHTTPObject()
         {
         	var http_request = false;
 	        if (window.XMLHttpRequest) { // Mozilla, Safari,...
@@ -60,16 +60,19 @@
 	        }
 	        return http_request;
         }
-        
+
         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.');
 	            }
 	        }
-	
+
 	    }
 	</script>
 	<?php
@@ -91,25 +94,25 @@
 			<td rowspan="3" width="100000" align="center">
 			<?php
 				echo $use_xml ? '<div id="server_status"></div>' : '&nbsp;';
-			?>	
+			?>
 			</td>
 			<td width="400">
 				<img title="" src="images/blocks.gif" width="400" height="73">
 			</td>
 		</tr>
-		
+
 		<tr>
   			<td align="right" background="images/version_bg.gif" class="head_version" valign="bottom">
   				<img title="" src="images/spacer.gif" width="1" height="10"  align="absmiddle">
 				<?php echo $application->Phrase('la_Logged_in_as').' <b>'.$loginname.' </b>'; ?>
   				<a href="<?php echo $logout; ?>" target="_parent"><img src="images/blue_bar_logout.gif" height="16" width="16" align="absmiddle" border="0"></A>
   			</td>
 		</tr>
-		
+
 		<tr>
 			<td><img title="" src="images/blocks2.gif" width="400" height="1"></td>
 		</tr>
-		
+
 		<tr>
 			<td bgcolor="black" colspan="4"><img title="" src="images/spacer.gif" width="1" height="1"></td>
 		</tr>
@@ -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
         }
