function getBrowserVersion() {
appname= navigator.appName;
appversion = navigator.appVersion;
majorver = appversion.substring(0, 1);
if ( (appname == "Netscape") && ( majorver >= 3 ) ) return 1;
if ( (appname == "Microsoft Internet Explorer") && (majorver >= 4) ) return 1;
return 0;
}function switch_image(num, imgname) {
if (getBrowserVersion()) {
document[imgname].src = img[num].src;
}
}
 
<!-- förladdning (preload) av bilder som ska användas -->
imagesrc = new Array();
imagesrc[0] = "./bilder/tmnyheter.jpg";
imagesrc[1] = "./bilder/tmnyheter2.jpg";
imagesrc[2] = "./bilder/tmnextgeneration.jpg";
imagesrc[3] = "./bilder/tmnextgeneration2.jpg";
imagesrc[4] = "./bilder/tmkontakt.jpg";
imagesrc[5] = "./bilder/tmkontakt2.jpg";
imagesrc[6] = "./bilder/tmpartners.jpg";
imagesrc[7] = "./bilder/tmpartners2.jpg";
imagesrc[8] = "./bilder/tmwebbtv.jpg";
imagesrc[9] = "./bilder/tmwebbtv2.jpg";
imagesrc[10] = "./bilder/tmovrigt.jpg";
imagesrc[11] = "./bilder/tmovrigt2.jpg";

imagesrc[12] = "./bilder/bjorkintroduktion.jpg";
imagesrc[13] = "./bilder/bjorkintroduktion2.jpg";
imagesrc[14] = "./bilder/bjorkforehand.jpg";
imagesrc[15] = "./bilder/bjorkforehand2.jpg";
imagesrc[16] = "./bilder/bjorkbackhand.jpg";
imagesrc[17] = "./bilder/bjorkbackhand2.jpg";
imagesrc[18] = "./bilder/bjorkvolley.jpg";
imagesrc[19] = "./bilder/bjorkvolley2.jpg";
imagesrc[20] = "./bilder/bjorkvolleytraning.jpg";
imagesrc[21] = "./bilder/bjorkvolleytraning2.jpg";
imagesrc[22] = "./bilder/bjorkserve.jpg";
imagesrc[23] = "./bilder/bjorkserve2.jpg";
imagesrc[24] = "./bilder/bjorkretur.jpg";
imagesrc[25] = "./bilder/bjorkretur2.jpg";
imagesrc[26] = "./bilder/bjorkuppvarmning.jpg";
imagesrc[27] = "./bilder/bjorkuppvarmning2.jpg";
imagesrc[28] = "./bilder/bjorkbloopers.jpg";
imagesrc[29] = "./bilder/bjorkbloopers2.jpg";

if (getBrowserVersion()) {
img = new Array();
for (i = 0; i < imagesrc.length; i++) {
img[i] = new Image();
img[i].src = imagesrc[i];
}
}