function hideLayer(whichLayer) {
if (document.getElementById) {

document.getElementById(whichLayer).style.visibility = "hidden";
}
else if (document.all) {

document.all[whichlayer].style.visibility = "hidden";
}
else if (document.layers) {

document.layers[whichLayer].visibility = "hidden";
}
}

function showLayer(whichLayer) {
if (document.getElementById) {

document.getElementById(whichLayer).style.visibility = "visible";
}
else if (document.all) {

document.all[whichlayer].style.visibility = "visible";
}
else if (document.layers) {

document.layers[whichLayer].visibility = "visible";
}
}

function handleClick(whichClick) {

if (whichClick == "hide it") {

hideLayer("popupJohn");

}
else if (whichClick == "show it") {

showLayer("popupJohn");
}

}