Hilfe bei Abfrage von Radiobuttons

[Rob]

Also okay, ich versuche es nochmal:

hier der javaSCRIPT versuch:

function updatePrice()
{

var price = new Array();
 var add_to_price = 0;

price[1] = new Array();
     price[1][1] = Number();
     price[1][2] = Number(+102.59);
     price[1][3] = Number(+512.93);
     price[1][4] = Number(+10258.62);

var sel_index = document.getElementById("cart_quantity").elements["id[1]"].checked;
var item_id = document.getElementById("cart_quantity").elements["id[1]"].value[sel_index].value;
  if (!isNaN(item_id))
   add_to_price += price[1][item_id];
   price[2] = new Array();
     price[2][8] = Number();
     price[2][7] = Number(+0.1);
     price[2][6] = Number(+10.26);
     price[2][5] = Number(+16.36);
    var sel_index = document.getElementById("cart_quantity").elements["id[2]"].checked;
var item_id = document.getElementById("cart_quantity").elements["id[2]"].value[sel_index].value;
  if (!isNaN(item_id))
   add_to_price += price[2][item_id];

var calculated_price = Number(original_price)+Number(add_to_price);
alert( calculated_price )
}

Ich hoffe ihr könnt mir jetzt helfen