Auto-Submitting Dropdown

gistfile1.html

<script>
    $('form select').change(function(){
        $('form').submit();
    });
</script>

<form action="boo" method="post">
    <select name="beatles">
        <option value="john">John</option>
        <option value="paul">Paul</option>
        <option value="george">George</option>
        <option value="ringo">Ringo</option>
    </select>
</form>