diff --git a/lib/javascript-static.js b/lib/javascript-static.js
index f2a746bbba4..e027ee33db4 100644
--- a/lib/javascript-static.js
+++ b/lib/javascript-static.js
@@ -309,7 +309,7 @@ M.util.init_maximised_embed = function(Y, id) {
     var resize_object = function() {
         obj.setStyle('width', '0px');
         obj.setStyle('height', '0px');
-        var newwidth = get_htmlelement_size('content', 'width') - 15;
+        var newwidth = get_htmlelement_size('maincontent', 'width') - 15;
 
         if (newwidth > 600) {
             obj.setStyle('width', newwidth  + 'px');
@@ -320,7 +320,11 @@ M.util.init_maximised_embed = function(Y, id) {
         var objheight = get_htmlelement_size(obj, 'height');
         var newheight = objheight + parseInt(obj.get('winHeight')) - pageheight - 30;
         if (newheight > 400) {
-            obj.setStyle('height', newheight + 'px');
+            if (newheight > 768) {
+                obj.setStyle('height', '768px');
+            } else {
+                obj.setStyle('height', newheight + 'px');
+            }
         } else {
             obj.setStyle('height', '400px');
         }
diff --git a/lib/resourcelib.php b/lib/resourcelib.php
index 0d4aa225273..260008905bd 100644
--- a/lib/resourcelib.php
+++ b/lib/resourcelib.php
@@ -474,7 +474,7 @@ EOT;
   </object>
 </div>
 EOT;
-        //$PAGE->requires->js_init_call('M.util.init_maximised_embed', array('resourceobject'), true);
+        $PAGE->requires->js_init_call('M.util.init_maximised_embed', array('resourceobject'), true);
     }
 
     return $code;