browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) version = "n3";
else if (browserVer >=4) version = "n3"; else version = "n2"

if (version == "n3") {
m1on = new Image();
m1on.src = "img/m1_.gif";
m1off = new Image();
m1off.src = "img/m1.gif";
}

if (version == "n3") {
m2on = new Image();
m2on.src = "img/m2_.gif";
m2off = new Image();
m2off.src = "img/m2.gif";
}

if (version == "n3") {
m3on = new Image();
m3on.src = "img/m3_.gif";
m3off = new Image();
m3off.src = "img/m3.gif";
}

if (version == "n3") {
m4on = new Image();
m4on.src = "img/m4_.gif";
m4off = new Image();
m4off.src = "img/m4.gif";
}

if (version == "n3") {
m5on = new Image();
m5on.src = "img/m5_.gif";
m5off = new Image();
m5off.src = "img/m5.gif";
}

if (version == "n3") {
m6on = new Image();
m6on.src = "img/m6_.gif";
m6off = new Image();
m6off.src = "img/m6.gif";
}

if (version == "n3") {
m7on = new Image();
m7on.src = "img/m7_.gif";
m7off = new Image();
m7off.src = "img/m7.gif";
}

if (version == "n3") {
m8on = new Image();
m8on.src = "img/m8_.gif";
m8off = new Image();
m8off.src = "img/m8.gif";
}

function img_act(imgName) {
if (version == "n3") {
imgOn = eval(imgName + "on.src");
document [imgName].src = imgOn;
}
}

function img_inact(imgName) {
if (version == "n3") {
imgOff = eval(imgName + "off.src");
document [imgName].src = imgOff;
}
}