function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function showLayer(LayerName)
{
  setVisibility(LayerName,'visible');
}

function hideLayer(LayerName)
{
  setVisibility(LayerName,'hidden');
}
function setVisibility(LayerName,Wert) {
  if(document.all || document.layers || document.getElementById) {
    var obj=document.all ? document.all[LayerName].style : document.layers ? document[LayerName] : document.getElementById(LayerName).style;
    obj.visibility = Wert;
  }
}