diff --git a/includes/simpleads.helper.inc b/includes/simpleads.helper.inc
index 21e4cee..8abc42c 100644
--- a/includes/simpleads.helper.inc
+++ b/includes/simpleads.helper.inc
@@ -145,8 +145,15 @@ function _simpleads_render_ajax_template($nodes, $tid, $limit, $settings1 = arra
     elseif ($ad['type'] == 'text') {
       $result .= theme('simpleads_text_element', array('ad' => $ad, 'settings' => $ad_setting));
     }
+    elseif ($ad['type'] == 'flash'){
+      $result .= theme('simpleads_flash_element', array('ad' => $ad, 'settings' => $ad_setting, 'css_class' => $css_class));
+    }
     else {
-      $result .= theme('simpleads_flash_element', array('ad' => $ad, 'settings' => $ad_setting));
+      $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);
+      }
     }
     $count++;
   }
@@ -414,4 +421,4 @@ function _simpleads_theme_attributes_init($vars) {
   $vars['content_attributes_array'] = array();
   $vars['classes_array'] = array('');
   return $vars;
-}
\ No newline at end of file
+}