JQuery :: Get Ajax Function To Post Url Parameters

I have two forms: register and contact, with action attribute that looks like this:

REGISTER.PHP AND CONTACT.PHP FORMS

<form id="myform" action="submit.php?url=register">

and

<form id="myform" action="submit.php?url=contact">

I would like the jquery ajax function to redirect to the above url parameters so that the forms can get processed in their individual functions.

The SUBMIT.PHP page looks like this:

$url = '';
if (isset($_GET['url'])){
$url = strip_tags($_GET['url']);}
if($url=='register'){

[Code].....