Revert "removed some XHTML problems (slider effect)"

This reverts commit 777a5f7844.

The div needs to be open because each usage of
PMA_generate_slider_effect includes end of div.

libraries/common.lib.php

@@ -2486,7 +2486,7 @@ function PMA_generate_slider_effect($id, $message)
     //]]>
     </script>
     <noscript>
-    <div id="<?php echo $id; ?>" />
+    <div id="<?php echo $id; ?>">
     </noscript>
     <?php
 }