how to extract data from javascript into php

Hi

This is a piece of code in javascript, embedded in html, for the
order page on an ecommerce site that i have made. I have this
particular script nested inside a <form> tag and have set the
action to a php file, but the tricky part is to extract the data
from the javascript code and to post these variables into a php
files, because their values...So i put in this data in textboxes
with names that change according to the counter and have
made the type hidden. The code is below:

//JAVASCRIPT
if (parent.item_num > 0){
for (i =1;i < parent.item_num;i++){
if (parent.itemlist.quan > 0){
index = index + 1;
document.write('<input size=35 type=hidden name=c+i
value= ' +  parent.itemlist.code + '>'+'<input size=3
type=hidden name=p+i value=' +  parent.itemlist.price +
'>'+'<input size=18 type=hidden  name=d+i  value= '+
parent.itemlist.desc + '>'+'<input size=3 type=hidden
name=q+i  value= '+  parent.itemlist.quan + '><br/>');
}
}
}



The piece of code in php  meant to handle the script is
<?php


$prod_name[]= "";
$prod_price[]= "";
$prod_painter[]= "";
$prod_quantity[]="";


//assuming that only 10 products are ordered...
for($i=1;$i<=10;$i++)
{
$prod_name[$i] = $_POST;
$prod_price[$i]=  $_POST;
$prod_painter[$i] =  $_POST;
$prod_quantity[$i]= $_POST;
}



for($i=0;$i<=10;$i++)
{
echo $prod_name[$i];
echo $prod_price[$i];
echo $prod_painter[$i];
echo  $prod_quantity[$i];
}


?>

The problem is with the php codes, the javascript works fine,
as for now I just want to get the data from js, I'll write it into a
file later...

Thankyou so much..