browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

function doPic(imgName) {
if (ns3up || ie4up) {
imgOn = ("" + imgName);
document.mainpic.src = imgOn;
   }
}

if (navigator.appVersion.indexOf("2.") != -1){
	check = false;
	}
if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){
	check = false;
	}
else
 {
	check = true;
	}
if (check == true){
 
	image1 = new Image();
	image1.src = "images/start_images/1.jpg";
	image1on = new Image();
	image1on.src = "images/start_images/1_over.jpg";
	image1alt = new Image();
	image1alt.src = "images/start_images/1.jpg";

	image2 = new Image();
	image2.src = "images/start_images/2.jpg";
	image2on = new Image();
	image2on.src = "images/start_images/2_over.jpg";
	image2alt = new Image();
	image2alt.src = "images/start_images/2.jpg";	

	image3 = new Image();
	image3.src = "images/start_images/3.png";
	image3on = new Image();
	image3on.src = "images/start_images/3_over.png";
	image3alt = new Image();
	image3alt.src = "images/start_images/3.png";

	image4 = new Image();
	image4.src = "images/start_images/4.jpg";
	image4on = new Image();
	image4on.src = "images/start_images/4_over.jpg";
	image4alt = new Image();
	image4alt.src = "images/start_images/4.jpg";


	image8 = new Image();
	image8.src = "images/layout/home.png";
	image8on = new Image();
	image8on.src = "images/layout/home_over.png";
	image8alt = new Image();
	image8alt.src = "images/layout/home.png";

	image9 = new Image();
	image9.src = "images/layout/zur_kasse.png";
	image9on = new Image();
	image9on.src = "images/layout/zur_kasse_over.png";
	image9alt = new Image();
	image9alt.src = "images/layout/zur_kasse.png";
	
	
}
imagealt = ""
function imageon(name){
	if (imagealt != name){
        	document[name].src = eval(name + "on.src");
	}
}
function imageoff(name){
	if (imagealt != name){
        	document[name].src = eval(name + ".src");
	}
}
function on(name){
        if (check == true){
	imageon(name);
	}
}
function off(name){
        if (check == true){
	imageoff(name);
	}
}
function alt(name){
	if (check == true){
	document[name].src = eval(name + "alt.src");
	if (imagealt != name){
		if (imagealt != ""){
			document[imagealt].src = eval(imagealt + ".src");
		}
	}
	imagealt = name
	}
}