I got a simple jquery script workin on all but IE
j('.slide').click(function(){
j('#content').load('/menu.php');
return false;
});
Here's the url http://identitykit.gotdns.org/ it's valid xhtml and all other similar questions don't answer my problem.
menu.php starts with
<?php
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
?>