You are putting the ordered items inside a cookie thru javascript.
This does have issues on computers that disabled javascript, but that's an issue for later concerns.
NewOrder = "Order." + iNumberOrdered;
SetCookie (NewOrder, dbUpdatedOrder, null, "/");
SetCookie ("NumberOrdered", iNumberOrdered, null, "/");
Here you put each item in seperate cookies. You can read this data thru PHP using $_COOKIE.
PHP Code:
if (isset($_COOKIE['NumberOrdered'])) {
for ($i=0; $i<=$_COOKIE['NumberOrdered']; ++$i) {
// do stuff with:
$_COOKIE["Order.$i"];
}
}