function add_to_basket (url, came_from, change) {
var tmp = url.split("?");
var qry = new Array;
if (tmp.length > 1)
  qry = tmp[1].split('&');

var u = tmp[0];
if (document.price_form) {
  u = u + '/' + document.price_form.price.value;
}
qry.push("came_from=" + came_from);
if (change) {
  qry.push("change=true");
}
window.location.href = u + "?" + qry.join("&");
}