var browserOK = true;
var activeImg;

nav01=new Image(); nav01.src="images/wat.gif";          nav02=new Image(); nav02.src="images/wat.gif"; 
nav11=new Image(); nav11.src="images/n_wir.gif";        nav12=new Image(); nav12.src="images/n_wir2.gif";
nav21=new Image(); nav21.src="images/n_dienst.gif";     nav22=new Image(); nav22.src="images/n_dienst2.gif";
nav31=new Image(); nav31.src="images/n_aktuell.gif";    nav32=new Image(); nav32.src="images/n_aktuell2.gif";
nav41=new Image(); nav41.src="images/n_buero.gif";      nav42=new Image(); nav42.src="images/n_buero2.gif";
nav51=new Image(); nav51.src="images/n_kontakt.gif";    nav52=new Image(); nav52.src="images/n_kontakt2.gif";

bild01=new Image(); bild01.src="images/ust.gif";     bild02=new Image(); bild02.src="images/ust.gif";
bild11=new Image(); bild11.src="images/m_wat1.jpg";     bild12=new Image(); bild12.src="images/m_wat.jpg";
bild21=new Image(); bild21.src="images/m_dienst1.jpg";  bild22=new Image(); bild22.src="images/m_dienst.jpg";
bild31=new Image(); bild31.src="images/m_aktuell1.jpg";   bild32=new Image(); bild32.src="images/m_aktuell.jpg";
bild41=new Image(); bild41.src="images/m_buero1.jpg"; bild42=new Image(); bild42.src="images/m_buero.jpg";
bild51=new Image(); bild51.src="images/m_kontakt1.jpg"; bild52=new Image(); bild52.src="images/m_kontakt.jpg";

function setActive() {
 activeImg = document.URL.substring(document.URL.indexOf("?nav")+4);
 imgName = "nav" + activeImg;
 bildName = "bild" + activeImg;
 document[bildName].src = eval(bildName + "2.src");
 document[imgName].src = eval(imgName + "2.src");
}

function bw(num) {
 if (browserOK) {
  imgName = "nav" + activeImg;
  bildName = "bild" + activeImg;
  document[bildName].src = eval(bildName + "1.src");  // bild grau
  document[imgName].src = eval(imgName + "1.src");    // schrift schwarz
  activeImg = num;
  bildName = "bild" + activeImg;
  document[bildName].src = eval(bildName + "2.src");
  parent.window.focus();
 }
}

function active(num) {
 if(num!=activeImg) {
  imgName = "nav" + num;
  bildName = "bild" + num;
  document[imgName].src = eval(imgName + "2.src");
  document[bildName].src = eval(bildName + "2.src");
 }
}

function inactive(num) {
 if(num!=activeImg) {
  imgName = "nav" + num;
  bildName = "bild" + num;
  document [imgName].src = eval(imgName + "1.src");
  document [bildName].src = eval(bildName + "1.src");
 }
}
        
function link(z1) {
 href=self.location.href;
 ii=href;
 href=href.substring(0,ii)+"n_"+z1+".htm";
 parent.frames[1].location.href=href;
}

if(window.top == window) {location.href='index.htm';}