Bn1 = "../Bld/PfL_hr.gif"
Bn2 = "../Bld/PfL_dg.gif"

non = new Image(); non.src = Bn1; noff = new Image(); noff.src = Bn2;

function rollon(imgName)
{  imgOn = eval(imgName + "on.src"); document.images[imgName].src = imgOn;; }
function rolloff(imgName)
{ document.images[imgName].src = eval(imgName + "off.src");; }

function Frm01(URL) { parent.frames[1].location.href = URL }