Added a link to use Online-Bookmarks as a real Firefox Sidebar.

settings.php

@@ -225,7 +225,7 @@ function check_date_format () {
 				</tr>
 			
 				<tr>
-					<td>Show the column with the change date: <?php echo date ("d.m.Y"); ?></td>
+					<td>Show the column with the change date: <?php echo date ($date_formats[$settings['date_format']]); ?></td>
 					<td>
 						<input type="checkbox" name="settings_show_column_date" <?php if ($settings['show_column_date'] == 1) {echo "checked";}?>></input>
 					</td>
@@ -355,6 +355,33 @@ function check_date_format () {
 				Note that if your browser has a Popup Blocker enabled you might experience difficulties using 
 				the upper link.
 			</p>
+
+			<hr>
+
+			<p>
+				<script type="text/javascript">
+				<!--
+				function addSidebar() {
+				  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")){
+				    var sidebarname=window.location.host;
+				    if (!/bug/i.test(sidebarname))
+				      sidebarname="Online Bookmarks "+sidebarname;
+				    window.sidebar.addPanel (sidebarname, "<?php echo $js_url; ?>/sidebar.php", "");
+				  }
+				  else{
+				    var rv = window.confirm ("Your browser does not support the sidebar extension.  " + "Would you like to upgrade now?");
+				    if (rv)
+				      document.location.href = "http://www.mozilla.org/";
+				  }
+				}
+				//-->
+				</script>
+				If you are using <a href="http://www.mozilla.com/firefox/">Firefox</a> as a webbrowser, you can
+				use the link below to add a bookmark which opens Online-Bookmarks as a sidebar.<br>
+				<b><a href="javascript:addSidebar()">Add to Sidebar</a></b>
+			</p>
+
+			<hr>
 		</td>
 	</tr>
 </table>