mn1= new Image();      mn1.src = "_img/4.jpg";
mh1= new Image();      mh1.src = "_img/2.jpg";


var Bildname,Bildobjekt;

function ImgSwap(Bildname,Bildobjekt)
{
   if (document.images)
   {
      var a = document[Bildname].name;
      document[a].src = Bildobjekt.src;
   }
}


browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

function doPic(imgName) 
{
   if (ns3up || ie4up)
   {
      imgOn = ("" + imgName);
      document.mainpic.src = imgOn;
   }
}

var ns4class='';