function toggleVisibility(id, NNtype, IEtype, W3Ctype) {
if (document.getElementById) {
eval("document.getElementById(id).style.visibility = \"" + W3Ctype + "\"");
} else {
if (document.layers) {
document.layers[id].visibility = NNtype;
} else {
if (document.all) {
eval("document.all." + id + ".style.visibility = \"" + IEtype + "\"");
}
}
}
}