function add_to_cart(product_id, size){var _f = document.forms['frm_add_to_cart'];if(_f && product_id > 0){_f.size.value = size;if(_f.quantity){_f.quantity.value = get_sel_val(document.getElementById('quantities_' + product_id));}_f.product_id.value = product_id;_f.submit(); }}