function getAppVersion() {
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;
if ( (appname == "Opera") && (majorver >= 7) ) return 1;
return 0;
}
function picturn(num, imgname) {
if (getAppVersion()) {
document[imgname].src = img[num].src;
}
}
imgsrc = new Array();

imgsrc[1] = "./img/tvorba-www-stranek.jpg";
imgsrc[2] = "./img/tvorba-www-stranek1.jpg";
imgsrc[3] = "./img/tvorba-e-shopu.jpg";
imgsrc[4] = "./img/tvorba-e-shopu1.jpg";
imgsrc[5] = "./img/registrace-domen.jpg";
imgsrc[6] = "./img/registrace-domen1.jpg";
imgsrc[7] = "./img/web-hosting.jpg";
imgsrc[8] = "./img/web-hosting1.jpg";
imgsrc[9] = "./img/logo-a-firemni-identita.jpg";
imgsrc[10] = "./img/logo-a-firemni-identita1.jpg";
imgsrc[11] = "./img/zvyseni-navstevnosti.jpg";
imgsrc[12] = "./img/zvyseni-navstevnosti1.jpg";

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