Problem when they vote.

Good morning. I have a problem and that is not exactly. When you put a vote, turning out the image but does not stop to reload the page. I have installed in Firefox webdeveloper and I see:
"options is null" in line "alert (error);"

You can test it in:
http://www.topiberian.com/component/com ... a?itemid=0

Any can help me?