//global variables
        var layerRef="null";
         var layerStyleRef="null";
          var styleSwitch="null";



function init()
{        if (navigator.appName == "Netscape")
        {        layerStyleRef="layer.";
                layerRef="document.layers";
                 styleSwitch="";
           }
            else
             {        layerStyleRef="layer.style.";
              layerRef="document.all";
               styleSwitch=".style";
            }
}

function showLayer(layerName)
{        eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
}
        function hideLayer(layerName)
{        eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
}


function impressum()
 {
   var win;
   var win2;
   win=window.open("impressum.html","impressum","width=350,height=500,scrollbars=no,location=no,date=no");
 }


function ZweiFrames(URL1,F1,URL2,F2,URL3,F3)
 {
  parent.frames[F1].location.href=URL1;
  parent.frames[F2].location.href=URL2;
    parent.frames[F3].location.href=URL3;
 }


 function illumination()
 {
   var win;
   var win2;
   win=window.open("illumination.html","illumination","width=450,height=600,scrollbars=No,location=no,date=no");
 }

   function speicherstadt()
 {
   var win;
   var win2;
   win=window.open("speicherstadt.html","speicherstadt","width=550,height=580,scrollbars=No,location=no,date=no");
 }

    function landungsbruecken_01()
 {
   var win;
   var win2;
   win=window.open("landungsbruecken_01.html","landungsbruecken_01","width=500,height=500,scrollbars=No,location=no,date=no");
 }