var nav = (document.layers) ? true : false;
var iex = (document.all) ? true : false;

var geladen = 0;


function show(name) {
  if(iex) { 
    document.all['' + name].style.visibility = "visible";
  } else if (nav) { 
    document.layers['' + name].visibility = "visible";
  } else {
    document.getElementById('' + name).style.visibility = "visible";
  }
}


function hide(name) {
  if(iex) { 
    document.all['' + name].style.visibility = "hidden";
  } else if (nav) { 
    document.layers['' + name].visibility = "hide";
  } else {
    document.getElementById('' + name).style.visibility = "hidden";
  }
}


function closeall() {

    imageChange('menu1','img_menu1');
    imageChange('menu2','img_menu9');
    imageChange('menu3','img_menu12');
    imageChange('menu5','img_menu8');
    imageChange('menu6','img_menu13');
    imageChange('menu7','img_menu10');
    imageChange('menu8','img_menu11');
    imageChange('menu72','img_menu15');
    imageChange('menu61','img_menu14');

}








function preload() {


  img_wertmeister = new Image();
  img_wertmeister.src = "bilder/interactive/bt_intro_wertmeister.gif";
  img_wertmeister_akt = new Image();
  img_wertmeister_akt.src = "bilder/interactive/bt_intro_wertmeister_akt.gif";

  img_probefahrt = new Image();
  img_probefahrt.src = "bilder/interactive/bt_intro_probefahrt.gif";
  img_probefahrt_akt = new Image();
  img_probefahrt_akt.src = "bilder/interactive/bt_intro_probefahrt_akt.gif";



  img_mehrzdt = new Image();
  img_mehrzdt.src = "bilder/interactive/bt_mehrzudiesemthema.gif";
  img_mehrzdt_akt = new Image();
  img_mehrzdt_akt.src = "bilder/interactive/bt_mehrzudiesemthema_akt.gif";
  img_mehrzdt_rot = new Image();
  img_mehrzdt_rot.src = "bilder/interactive/bt_mehrzudiesemthema_rot.gif";


  
  

  geladen=1;

}




function imageChange(imageID,imageName) {
  if (geladen==1) {
    document.images[imageID].src = eval(imageName + ".src");
  }
}




function blurb(obj) {
      if (navigator.appName == 'Microsoft Internet Explorer')
      { obj.blur(); }
      }