I can't get any jQuery code to excecute.

I can't get any jQuery code to excecute.

I can't get any code to work! As a test I have written this code. Any idea what could be causing this to not work?

  1. <body>
        <script type="text/javascript">
            $(document).ready(function()
            {
                $('div').hide();
            });
        </script>
        <div>
            Test
        </div>
    </body>