var browser     = '';
var version     = '';
var entrance    = '';
var cond        = '';

if (browser == ''){
if (navigator.appName.indexOf('Microsoft') != -1)
browser = 'IE'
else if (navigator.appName.indexOf('Netscape') != -1)
browser = 'Netscape'
else browser = 'NN';
}

if (version == ''){
version= navigator.appVersion;
paren = version.indexOf('(');
whole_version = navigator.appVersion.substring(0,paren-1);
version         = parseInt(whole_version);
}

if (browser == 'IE' && version >= 4) entrance = 'yes';
if (browser == 'IE' && version < 4) entrance = 'no';
if (browser == 'Netscape' && version >= 2.02) entrance = 'yes';
if (browser == 'Netscape' && version < 2.02) entrance = 'no';
if (entrance=='yes'){
nameIDa = new Image;nameIDa.src = 'images/podrobnosti.gif';
nameIDb = new Image;nameIDb.src = 'images/podrobnosti_over.gif';
name0a = new Image;name0a.src = 'images/menu_00.gif';
name0b = new Image;name0b.src = 'images/menuOver_00.gif';
//name1a = new Image;name1a.src = 'images/menu_01.gif';
//name1b = new Image;name1b.src = 'images/menuOver_01.gif';    
name2a = new Image;name2a.src = 'images/menu_02.gif';
name2b = new Image;name2b.src = 'images/menuOver_02.gif';
//name3a = new Image;name3a.src = 'images/menu_03.gif';
//name3b = new Image;name3b.src = 'images/menuOver_03.gif';
name4a = new Image;name4a.src = 'images/menu_04.gif';
name4b = new Image;name4b.src = 'images/menuOver_04.gif';
name5a = new Image;name5a.src = 'images/menu_05.gif';
name5b = new Image;name5b.src = 'images/menuOver_05.gif';
name6a = new Image;name6a.src = 'images/menu_06.gif';
name6b = new Image;name6b.src = 'images/menuOver_06.gif';
name7a = new Image;name7a.src = 'images/menu_07.gif';
name7b = new Image;name7b.src = 'images/menuOver_07.gif';
name8a = new Image;name8a.src = 'images/menu_08.gif';
name8b = new Image;name8b.src = 'images/menuOver_08.gif';
}
function lighten(imgName) {
if (entrance == 'yes'){
imgOn = eval(imgName + 'b.src');
document[imgName].src = imgOn;}
}
function darken(imgName) {
if (entrance == 'yes'){
imgOff = eval(imgName + 'a.src');
document[imgName].src = imgOff;}
 }