Fixing firefox js error.

main/template/default/layout/footer.tpl

@@ -80,7 +80,7 @@ $(document).ready( function() {
      *     hidden content :)
      * </div>
      * */
-    $(".advanced_options").on("click", function() {
+    $(".advanced_options").on("click", function(event) {
         event.preventDefault();
         var id = $(this).attr('id') + '_options';
         var button = $(this);
@@ -94,13 +94,13 @@ $(document).ready( function() {
      * <a class="advanced_options_close" href="http://" rel="div_id">Close</a>
      * <div id="div_id">Div content</div>
      * */
-    $(".advanced_options_open").on("click", function() {
+    $(".advanced_options_open").on("click", function(event) {
         event.preventDefault();
         var id = $(this).attr('rel');
         $("#"+id).show();
     });
 
-    $(".advanced_options_close").on("click", function() {
+    $(".advanced_options_close").on("click", function(event) {
         event.preventDefault();
         var id = $(this).attr('rel');
         $("#"+id).hide();