diff --git a/includes/simpleads.helper.inc b/includes/simpleads.helper.inc
index cbd3532..5e7df49 100644
--- a/includes/simpleads.helper.inc
+++ b/includes/simpleads.helper.inc
@@ -147,9 +147,16 @@ function _simpleads_render_ajax_template($nodes, $tid, $limit, $settings1 = arra
     elseif ($ad['type'] == 'text') {
       $result .= theme('simpleads_text_element', array('ad' => $ad, 'settings' => $ad_setting, 'css_class' => $css_class));
     }
-    else {
+    elseif ($ad['type'] == 'flash') {
       $result .= theme('simpleads_flash_element', array('ad' => $ad, 'settings' => $ad_setting, 'css_class' => $css_class));
     }
+    else {
+      $func = $ad['type'] . '_simpleads_display';
+      if (function_exists($func)) {
+        // Allow another module defined new ads type and render this.
+        $result .= $func($ad, $ad_setting, $css_class);
+      }
+    }
     $count++;
   }
   $this_block_settings = _simpleads_adgroup_settings($tid);
@@ -503,4 +510,5 @@ function _simpleads_get_node_status($nid) {
     ->execute()
     ->fetchField();
   return (int)$node_status;
-}
\ No newline at end of file
+}
+