browserName = navigator.appName; 
browserVer = parseInt(navigator.appVersion); 
browser = "NotOk"; 

if (browserName == "Netscape" && browserVer >= 3) { browser = "ok"} 
if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) { browser = "ok"} 

if (browser == "ok") { 
Link1= new Image(); Link1.src = "maindata/images/menu_top/news_off.gif"; 
Link1on = new Image(); Link1on.src = "maindata/images/menu_top/news_on.gif"; 
Link2= new Image(); Link2.src = "maindata/images/menu_top/sponsoren_off.gif"; 
Link2on = new Image(); Link2on.src = "maindata/images/menu_top/sponsoren_on.gif"; 
Link3= new Image(); Link3.src = "maindata/images/menu_top/media_off.gif"; 
Link3on = new Image(); Link3on.src = "maindata/images/menu_top/media_on.gif";
Link4= new Image(); Link4.src = "maindata/images/menu_top/downloads_off.gif"; 
Link4on = new Image(); Link4on.src = "maindata/images/menu_top/downloads_on.gif";
Link5= new Image(); Link5.src = "maindata/images/menu_top/forum_off.gif"; 
Link5on = new Image(); Link5on.src = "maindata/images/menu_top/forum_on.gif";
Link6= new Image(); Link6.src = "maindata/images/menu_top/faq_off.gif"; 
Link6on = new Image(); Link6on.src = "maindata/images/menu_top/faq_on.gif";
}

function swap(imgName,select) 

{ if (browser == "ok") {imgOn = eval(select+ ".src"); 
document.images[imgName].src = imgOn; }}