var isIE4 = false;
var isNA4 = false;
var isIE3 = false;
var isNA3 = false;

function onLoad()
{
   if(navigator.appName == "Netscape"){
      if( parseInt(navigator.appVersion) >= 4)
         isNA4 = true;
      else
         isNA3 = true;
   }
   else{
      if( parseInt(navigator.appVersion) >= 4)
         isIE4 = true;
      else
         isIE3 = true;
   }
   graphLoad();
}

onLoad();

function graphLoad()
{
  if(document.images)
  {
    home = new Image();
    home.src = "../img/navi/home_off.gif";
    suche = new Image();
    suche.src = "../img/navi/suche_off.gif";
    impress = new Image();
    impress.src = "../img/navi/impress_off.gif";
    news = new Image();
    news.src = "../img/navi/mailingliste_off.gif";

    home_ov = new Image();
    home_ov.src = "../img/navi/home_ov.gif";
    suche_ov = new Image();
    suche_ov.src = "../img/navi/suche_ov.gif";
    impress_ov = new Image();
    impress_ov.src = "../img/navi/impress_ov.gif";
    news_ov = new Image();
    news_ov.src = "../img/navi/mailingliste_ov.gif";
  }
}

// ____________________________________________________________________
function swap_img(A, B)
{
  if(document.images){
    Neu = eval(B + '.src');
    document [A].src = Neu;
    return;
  }
}