Posting values w/o removing old values

[Local_Hero]

I have 4 dropdown boxes. Quantity - Products - Sizes - Colors. After the user chooses they submit and the form action is the <?php $_SERVER['PHP_SELF']; ?>. At the top of the page is:

<?php
$product = $POST['product'];
$size = $POST['select_2'];
$color = $POST['select_X'];
$quantity = $POST['quantity'];
?>

Later on I simply echo these values.

<?php echo( $quantity ." - ". $product." - ". $color ." - ". $size ); ?>

The user can submit a second product with options. When it does that, it replaces the first selection that I echoed. How do I tell it to remember the first selection, and add any additional inputs?
Thanks!

[drew010]

use hidden fields to preserve the old values
<input type="hidden" name="product" value="<?php echo $_POST['product']; ?>" />

they arent being overwritten, post variables are only retained for the 1 page after the post. if you want them longer you have to preserve them yourself, either with the method mentioned above or with [man]session[/man]s

[Local_Hero]

The problem that I'm having is this: I have JS running the 4 inputs so the names and ids cannot be changed. How do I keep writing to hidden or text inputs with out replacing previous posts?

[drew010]

push them to a form based array maybe or come up with another naming scheme where you can come up with different names.