[jQuery] Ajax forms

[Dave Maharaj :: WidePixels.com]

Can someone give me a hand getting this right. Using the jQuery Form Plugin
on http://malsup.com/jquery/form/ I am trying to submit a form but the
script I am having problems with. I know its wrong...but cant figure out how
to remove the duplicate post and url parts.

$(document).ready(function() {
      $('#UpdateForm').bind('submit', function() {
        var queryString = $('#UpdateForm').formSerialize();
        $.post('/update', queryString);
            $(this).ajaxSubmit({
                                type:   'post',
                                url:    '/update',
                                target:         '#userForm',
                                success:        function()
{alert(queryString);} 
            });
            return false; // <-- important!
        });
});

Can someone point out the correct way to set up this function?

Thanks,

Dave