Dialog wierd look

Dialog wierd look


Hello I got a problem I've downloaded the UI library from jquery using
the Build your download function. And checked every option using the
rc build.
But when I try this:
<script type="text/javascript" charset="utf-8">
    $(document).ready(function(){
        $("#addUserDialog").dialog();
    });
</script>
It looks like this www.huscorp.nl, I unfortunately cant give the real
url yet, but does anyone know why it looks like this. Am I supposed to
make my own css stylesheet? Anyway I re-downloaded the UI lib a couple
of times but that didn't if it. Ive also looked at firebug to check if
its loading properly. Im on a Mac os X leopard and checked it with
firefox and safarie both 3+.
Can someone help me?
JQuery team keep up the good work!