diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index 73129803ee..9745d493c4 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -61,10 +61,23 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 		{
 			markread('all', false, false, request_var('mark_time', 0));
 
-			trigger_error(
-				$user->lang['FORUMS_MARKED'] . '<br /><br />' .
-				sprintf($user->lang['RETURN_INDEX'], '<a href="' . $redirect . '">', '</a>')
-			);
+			if (!$request->is_ajax())
+			{
+				trigger_error(
+					$user->lang['FORUMS_MARKED'] . '<br /><br />' .
+					sprintf($user->lang['RETURN_INDEX'], '<a href="' . $redirect . '">', '</a>')
+				);
+			}
+			else
+			{
+				// Tell the ajax script what language vars need to be replaced
+				$data = array(
+					'NO_UNREAD_POSTS'	=> $user->lang['NO_UNREAD_POSTS'],
+					'UNREAD_POSTS'		=> $user->lang['UNREAD_POSTS']
+				);
+				$json_response = new phpbb_json_response();
+				$json_response->send($data);
+			}
 		}
 		else
 		{
@@ -313,7 +326,20 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 			$message = sprintf($user->lang['RETURN_FORUM'], '<a href="' . $redirect . '">', '</a>');
 			meta_refresh(3, $redirect);
 
-			trigger_error($user->lang['FORUMS_MARKED'] . '<br /><br />' . $message);
+			if (!$request->is_ajax())
+			{
+				trigger_error($user->lang['FORUMS_MARKED'] . '<br /><br />' . $message);
+			}
+			else
+			{
+				// Tell the ajax script what language vars need to be replaced
+				$data = array(
+					'NO_UNREAD_POSTS'	=> $user->lang['NO_UNREAD_POSTS'],
+					'UNREAD_POSTS'		=> $user->lang['UNREAD_POSTS']
+				);
+				$json_response = new phpbb_json_response();
+				$json_response->send($data);
+			}
 		}
 		else
 		{
diff --git a/phpBB/styles/prosilver/template/ajax.js b/phpBB/styles/prosilver/template/ajax.js
index fa31d3268f..4ae4f91d8d 100644
--- a/phpBB/styles/prosilver/template/ajax.js
+++ b/phpBB/styles/prosilver/template/ajax.js
@@ -2,6 +2,22 @@
 
 "use strict";
 
+// This callback will mark all forum icons read
+phpbb.add_ajax_callback('mark_forums_read', function(res) {
+	var read_title = res.NO_UNREAD_POSTS;
+	var unread_title = res.UNREAD_POSTS;
+
+	$('li.row dl.forum_unread').each(function(e) {
+		$(this).removeClass('forum_unread').addClass('forum_read');
+		$(this).children('dt[title=' + unread_title + ']').attr('title', read_title);
+	});
+
+	$('li.row dl.forum_unread_subforum').each(function(e) {
+		$(this).removeClass('forum_unread_subforum').addClass('forum_read_subforum');
+		$(this).children('dt[title=' + unread_title + ']').attr('title', read_title);
+	});
+});
+
 // This callback finds the post from the delete link, and removes it.
 phpbb.add_ajax_callback('post_delete', function() {
 	var el = $(this),
diff --git a/phpBB/styles/prosilver/template/index_body.html b/phpBB/styles/prosilver/template/index_body.html
index 6babbf5997..0682abffed 100644
--- a/phpBB/styles/prosilver/template/index_body.html
+++ b/phpBB/styles/prosilver/template/index_body.html
@@ -8,7 +8,7 @@
 	<!-- IF S_DISPLAY_SEARCH -->
 		<li><a href="{U_SEARCH_UNANSWERED}">{L_SEARCH_UNANSWERED}</a><!-- IF S_LOAD_UNREADS --> &bull; <a href="{U_SEARCH_UNREAD}">{L_SEARCH_UNREAD}</a><!-- ENDIF --><!-- IF S_USER_LOGGED_IN --> &bull; <a href="{U_SEARCH_NEW}">{L_SEARCH_NEW}</a><!-- ENDIF --> &bull; <a href="{U_SEARCH_ACTIVE_TOPICS}">{L_SEARCH_ACTIVE_TOPICS}</a></li>
 	<!-- ENDIF -->
-	<!-- IF not S_IS_BOT and U_MARK_FORUMS --><li class="rightside"><a href="{U_MARK_FORUMS}" accesskey="m" data-ajax="true">{L_MARK_FORUMS_READ}</a></li><!-- ENDIF -->
+	<!-- IF not S_IS_BOT and U_MARK_FORUMS --><li class="rightside"><a href="{U_MARK_FORUMS}" accesskey="m" data-ajax="mark_forums_read" data-overlay="false">{L_MARK_FORUMS_READ}</a></li><!-- ENDIF -->
 </ul>
 <!-- ENDIF -->
 
diff --git a/phpBB/styles/prosilver/template/viewforum_body.html b/phpBB/styles/prosilver/template/viewforum_body.html
index a3239602ae..0f2c1a30ec 100644
--- a/phpBB/styles/prosilver/template/viewforum_body.html
+++ b/phpBB/styles/prosilver/template/viewforum_body.html
@@ -28,7 +28,7 @@
 <!-- IF S_HAS_SUBFORUM -->
 <!-- IF not S_IS_BOT and U_MARK_FORUMS -->
 <ul class="linklist">
-	<li class="rightside"><a href="{U_MARK_FORUMS}">{L_MARK_SUBFORUMS_READ}</a></li>
+	<li class="rightside"><a href="{U_MARK_FORUMS}" data-ajax="mark_forums_read" data-overlay="false">{L_MARK_SUBFORUMS_READ}</a></li>
 </ul>
 <!-- ENDIF -->
 	<!-- INCLUDE forumlist_body.html -->