browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
version = browserName.substring(0,1) + browserVer;

if (version == "N3" || version == "N4" || version == "M3" || version == "M4") {

	homeon = new Image(107,18); homeon.src = "bilder/buttons/home_on.gif";
	lebeon = new Image(107,18); lebeon.src = "bilder/buttons/lebe_on.gif";
	krafon = new Image(107,18); krafon.src = "bilder/buttons/kraf_on.gif";
	kranon = new Image(107,18); kranon.src = "bilder/buttons/kran_on.gif";
	hauson = new Image(107,18); hauson.src = "bilder/buttons/haus_on.gif";
	hafton = new Image(107,18); hafton.src = "bilder/buttons/haft_on.gif";
	unfaon = new Image(107,18); unfaon.src = "bilder/buttons/unfa_on.gif";
	rechon = new Image(107,18); rechon.src = "bilder/buttons/rech_on.gif";
	bauson = new Image(107,18); bauson.src = "bilder/buttons/baus_on.gif";
	kapion = new Image(107,18); kapion.src = "bilder/buttons/kapi_on.gif";
	konton = new Image(107,18); konton.src = "bilder/buttons/kont_on.gif";
	impron = new Image(107,18); impron.src = "bilder/buttons/impr_on.gif";

	homeoff = new Image(107,18); homeoff.src = "bilder/buttons/home_off.gif";
	lebeoff = new Image(107,18); lebeoff.src = "bilder/buttons/lebe_off.gif";
	krafoff = new Image(107,18); krafoff.src = "bilder/buttons/kraf_off.gif";
	kranoff = new Image(107,18); kranoff.src = "bilder/buttons/kran_off.gif";
	hausoff = new Image(107,18); hausoff.src = "bilder/buttons/haus_off.gif";
	haftoff = new Image(107,18); haftoff.src = "bilder/buttons/haft_off.gif";
	unfaoff = new Image(107,18); unfaoff.src = "bilder/buttons/unfa_off.gif";
	rechoff = new Image(107,18); rechoff.src = "bilder/buttons/rech_off.gif";
	bausoff = new Image(107,18); bausoff.src = "bilder/buttons/baus_off.gif";
	kapioff = new Image(107,18); kapioff.src = "bilder/buttons/kapi_off.gif";
	kontoff = new Image(107,18); kontoff.src = "bilder/buttons/kont_off.gif";
	improff = new Image(107,18); improff.src = "bilder/buttons/impr_off.gif";

}
 
function img_act(imgName) {
   if (version == "N3" || version == "N4" || version == "M3"  || version == "M4") {
         imgOn = eval(imgName + "on.src");
         document [imgName].src = imgOn;
   }
}

function img_inact(imgName) {
   if (version == "N3" || version == "N4" || version == "M3"  || version == "M4") {
         imgOff = eval(imgName + "off.src");
         document [imgName].src = imgOff;
   }
}