gistfile1.rhtml

<% content_for(:head) do -%>
  <script type="text/javascript">
    //<![CDATA[
    $(function() {
      $("#form_link").click(function() {
        $("#form_submission_business_name").focus();
      });
    });
    //]]>
  </script>
<% end -%>

...

<a id="form_link" href="#form">contact form</a>