function go1(chk)
{
                if (chk==0) {
                        document.location = '/b01.php';
                } else if (chk==1) {
                        document.location = '/plc01.php'; 
                } else if (chk==2) {
                        document.location = ''; 
                } else if (chk==3) {
                        document.location = ''; 
                } else if (chk==4) {
                        document.location = ''; 
                }

}