[jQuery] How do I run an ajax request on form submit?

[HairyJim]

Im new with jQuery and I have quite quickly turned a 54 line script
into a 5 line jQuery script :)

However all I want to do now is run an ajax request on the form submit
but the problem I am finding is that it seems the form gets submitted
before the ajax query returns its data - thoughts?

<script type="text/javascript">
$(document).ready(function()
{
        $("form#RegForm").submit(function()
        {
                $.get("gencode.php",function(response)
                {
                        response=response.split("\n");
                        $("#serialnumber").val(response[0]);
                        $("#passcode").val(response[1]);
                });
        return true;
        });
});
</script>

Thanks Jim