function checkCylinder() {
var error = "";
   if ((document.cyl.p1.selectedIndex == 0) && (document.cyl.p2.selectedIndex > 1)){
       error = "Please Select a Cylinder.\n";
    }
return error;
}

function checkKO() {
var error = "";
   if ((document.cyl.p2.selectedIndex == 0) && (document.cyl.p1.selectedIndex != 0)){
       error = "Please Select a Keying Option.\n";
    }
return error;
}