function fStyle(fNm, fProNm, NP) {
        if (document.all) document.all(fNm).style[fProNm] = NP
        else if (document.layers) document.layers[fNm][fProNm] = NP
        else if (!document.all && document.getElementById) document.getElementById(fNm).style[fProNm] = NP
}
function fVisible(fLayerNm, fBool) {   (fBool) ? NP = "visible" : NP = "hidden";   fStyle(fLayerNm, "visibility", NP)   }