var ie = document.all ? 1 : 0;
var ns = document.layers ? 1 : 0;
var topcss = 165;
if (ns)
        topcss = 200;
function showLayer(name)
{
        if (ie)
                document.all[name].style.visibility = "visible";
        else if (ns)
                document.layers[name].visibility = "show";
}
function hideLayer(name)
{
        if (ie)
                document.all[name].style.visibility = "hidden";
        else if (ns)
                document.layers[name].visibility = "hide";
}