DYN = true;

function Array() { ; }

function update_layers() {
  if ( DYN ) {
    for ( var key in layers_array ) {
      if ( layers_array[key] ) {
        zeigeEbene(key);
      } else {
        verbergeEbene(key);
      }
    } 
  }
}

function layer_on(id) {
  setZIndex(id,500);
  layers_array[id]=1;
  update_layers();
}

function layer_off(id) {
  layers_array[id]=0;
  setTimeout("update_layers();", 1000);
}


browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
var browser = "bad";
 if (browserName == "Netscape" && browserVer >= 3){
  browser = "good";
 }
 if (browserVer >= 4){
  browser = "good";
 }

function image_on(imgName){
 if (browser == "good"){
  imgOn = eval(imgName + "_on.src");
  document [imgName].src = imgOn;
 }
}

function image_off(imgName){
 if (browser == "good"){
  imgOff = eval(imgName + "_off.src");
  document [imgName].src = imgOff;
 }
}