function hideit(thelayer) {
if (document.getElementById) {
// standard
document.getElementById(thelayer).style.visibility = "hidden";
}
else if (document.all) {
// old IE versions
document.all[thelayer].style.visibility = "hidden";
}
else if (document.layers) {
// Netscape 4
document.layers[thelayer].visibility = "hidden";
}
}

function showit(thelayer) {
if (document.getElementById) {
// standards
document.getElementById(thelayer).style.visibility = "visible";
}
else if (document.all) {
// old IE versions
document.all[thelayer].style.visibility = "visible";
}
else if (document.layers) {
// Netscape 4
document.layers[thelayer].visibility = "visible";
}
}