<input
    class="add-to-cart"
    type="submit"
    value="купить"
    onclick="javascript:open_window('/cart.php?addproduct={$product_info.productID}{*
        *}{counter name='select_counter_hidden' start=0 skip=1 print=false}{*
        *}{counter name='select_counter_hidden_extra' start=0 skip=1 print=false}{*
        *}{section name=i loop=$product_extra}{*
            *}{if $product_extra[i].option_type eq 1}{*
                *}{section name=s loop=$product_extra[i].option_show_times}{*
                    *}&option_select_hidden_{*
                        *}{counter name=select_counter_hidden}=' + document.HiddenFieldsForm.option_select_hidden_{*
                        *}{counter name=select_counter_hidden_extra}.value + '{*
                *}{/section}{*
            *}{/if}{*
        *}{/section}', 400, 300); return false;"
/>