// create a layer name that is compatible with both IE4+ and NS4+
function jsMakeBrowserCompatibleLayerName( layerID )
{
    if( navigator.appName == "Netscape" )
    {
        refname = eval( "document." + layerID );
    }
    else
    {
        refname = eval( "document.all." + layerID + ".style" );
    }

    return refname;
}