function shdiv (dv,p1,p2) {
document.getElementById(dv).className=dv + 'on';
document.getElementById(p1).style.visibility = "visible";
document.getElementById(p2).style.visibility = "visible";
}
function hddiv (dv,p1,p2) {
document.getElementById(dv).className=dv + 'off';
document.getElementById(p1).style.visibility = "hidden";
document.getElementById(p2).style.visibility = "hidden";
}