m1_off = new Image();
m1_off.src = "thema/001/image/sitemap_ico.gif";
m1_ovr = new Image();
m1_ovr.src = "thema/001/image/sitemap_ico_a.gif";

m2_off = new Image();
m2_off.src = "thema/001/image/home_ico.gif";
m2_ovr = new Image();
m2_ovr.src = "thema/001/image/home_ico_a.gif";

m3_off = new Image();
m3_off.src = "thema/001/image/favor_ico.gif";
m3_ovr = new Image();
m3_ovr.src = "thema/001/image/favor_ico_a.gif";

function ovr(img)
{
var imgovr = eval(img + "_ovr.src");
document.images[img].src = imgovr;
}
function off(img)
{
var imgoff = eval(img + "_off.src");
document.images[img].src = imgoff;
}
//*******
nereidFadeObjects = new Object();
nereidFadeTimers = new Object();
function nereidFade(object, destOp, rate, delta){
if (!document.all)
return
if (object != "[object]"){ 
setTimeout("nereidFade("+object+","+destOp+","+rate+","+delta+")",0);
return;
}
clearTimeout(nereidFadeTimers[object.sourceIndex]);
diff = destOp-object.filters.alpha.opacity;
direction = 1;
if (object.filters.alpha.opacity > destOp){
direction = -1;
}
delta=Math.min(direction*diff,delta);
object.filters.alpha.opacity+=direction*delta;
if (object.filters.alpha.opacity != destOp){
nereidFadeObjects[object.sourceIndex]=object;
nereidFadeTimers[object.sourceIndex]=setTimeout("nereidFade(nereidFadeObjects["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
}
}
<!--
function MM_reloadPage(init) { 
if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);