function update_cart(ar,bnr)
{
    var ar = ar;
    var bnr = bnr;
    var url = '/ajax/update_cart.php';
    var pars = 'ar=' + ar + '&bnr=' + bnr;

    var myAjax = new Ajax.Updater(
                    {success: 'my_cart'},url,
                    {
                            method: 'post',
                            parameters: pars,
                            evalScripts: true
                    });
}

function eval_payment(action)
{
    document.form1.action = action;
}