Selecting one form to be visible using jQuery
Change the option values to the div ids

&lt;option value="cf-query"&gt;I have a query&lt;/option&gt;
…

Hide all elements with class cf-section.
Finally reference the value and show it, no need for the multiple if statements.

$("select").change(function() {
  $(".cf-section").hide();
  id = "#" + $(this).val();
  $(id).show("slow");
}



Now you can add as many as you want and your jQuery function code never changes.