function hideMenu(whichMenu) {

if (whichMenu == "DDvib") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDnoise") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDmulti") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDhire") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDrec") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDsound") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

if (whichMenu == "DDcal") {
document.getElementById(whichMenu).style.visibility = 'hidden';
}

}