[jQuery] How do I do a Ajax request before form submits

[jQuery] How do I do a Ajax request before form submits


Hi,
I created a form which I wanted to submit using jQuery (I'm new to jq)
but before the submit I wanted to run an ajax request and attach the
returned result to the form for posting. However it seems the form
submits before the ajax request is returned, I can see the code
generated in the DB but it never gets attached to the form.
If I set the return false; and hit submit the ajax process runs and is
attached to the forms hidden field correctly but obviously the form
does not get submitted, any thoughts for a 'green skin' on this
matter?
<script type="text/javascript">
$(document).ready(function()
{
    $("form#RegForm").submit(function()
    {
        $.get("servertime.php",function(response)
        {
            response=response.split("\n");
            $("#serialnumber").val(response[0]);
            $("#passcode").val(response[1]);
        });
    return true;
    });
});
</script>
Cheers
Jim