function lshow(layer)   {
    if(navigator.appName != "Netscape")
        document.all[layer].style.visibility="visible";
    else
        document.layers[layer].visibility="show";
}

function lhide(layer)   {
    if(navigator.appName != "Netscape")
        document.all[layer].style.visibility="hidden";
    else
        document.layers[layer].visibility="hide";    
}