[SOLVED] Keeping the id number in a url

[cturner]

When I press the submit button the id number disappears from the url. I wondering how I can keep a id number in a url? Why does it disappear from the url? Thanks in advance.

Here is some of my code that I am working with:
[code=php:0]
$id = mysql_real_escape_string($_GET['id']);
[/code]

[code]
<form action="<?php echo $PHP_SELF; ?>?id=<?php $id ?>" method="post" enctype="multipart/form-data" name="editpropertyForm" id="editpropertyForm">
[/code]

[trq]

[code]
<form action="<?php echo $PHP_SELF; ?>?id=<?php echo $id; ?>" method="post" enctype="multipart/form-data" name="editpropertyForm" id="editpropertyForm">
[/code]

[cturner]

I must have been at my computer to long, to not notice that. :)