function opencart() {
var sid = document.escart1.sid.value;
var pid = document.escart1.pid.value;
var num = document.escart1.num.options[document.escart1.num.selectedIndex].value;
var url = 'http://v3.eshop-do.com/program/cart/cart.php?sid=' + sid + '&pid=' + pid + '&num=' + num;

window.open(url,'','toolbar=yes,status=yes,scrollbars=yes,resizable=yes,width=800,height=600');
}