function checkQty(formObj) {
        if (formObj.op1.value == "" || formObj.op1.value == "0") {
                formObj.op1.value = "1";
        }
}

function openDetails(pid) {
        window.open("index.php?page=show_prod&pid="+pid,"DetailsProd","width=420,height=500,scrollbars=yes,status=yes");
}