Add jquery in header
<script type="text/javascript" src="//www.google.com/jsapi"></script>
<script type="text/javascript">google.load("jquery", "1");</script>
Added to JS by Vayu Robins
<script type="text/javascript" src="//www.google.com/jsapi"></script>
<script type="text/javascript">google.load("jquery", "1");</script>
Added to JS by Vayu Robins