/* Browserweiche */

ns4 = (document.layers) ? true : false;
ie = (document.styleSheets && document.all) ? true : false;
ns6 = (document.getElementById && !document.all) ? true : false;

function layerVerstecken()
{
  var layername1 = "bild";
  var layer1 = (navigator.appName == 'Netscape') ? document.layers[layername1] : document.all[layername1];
   var layername2 = "bild_orig";
  var layer2 = (navigator.appName == 'Netscape') ? document.layers[layername2] : document.all[layername2];
  if (navigator.appName == 'Netscape')
  {
     layer1.visibility = 'hide'; // show || hide
     layer2.visibility = 'show';
  }
  else
  {
      layer1.style.visibility = 'hidden';// visible || hidden
      layer2.style.visibility = 'visible';
  }
}

function layerZeigen(nr)
{
  var layername1 = "bild";
  var layer1 = (navigator.appName == 'Netscape') ? document.layers[layername1] : document.all[layername1];
   var layername2 = "bild_orig";
  var layer2 = (navigator.appName == 'Netscape') ? document.layers[layername2] : document.all[layername2];
 if (navigator.appName == 'Netscape')
  {
     layer1.visibility = 'show'; // show || hide
     layer2.visibility = 'hide';
  }
 else
  {
      layer1.style.visibility = 'visible';// visible || hidden
      layer2.style.visibility = 'hidden';
  }
 var bild = "../galerie/galeriebild"+nr+".jpg";
 /* Bild im div "bild" */
 parent.document.images[0].src = bild;
}