function over(imgname) {
    document.all[imgname].test=document.all[imgname].src;
    document.all[imgname].src=document.all[imgname].lowsrc;
    document.all[imgname].lowsrc=document.all[imgname].test;
  }

  function out(imgname) {
    document.all[imgname].test=document.all[imgname].src;
    document.all[imgname].src=document.all[imgname].lowsrc;
    document.all[imgname].lowsrc=document.all[imgname].test;
  }

  function getBrowser() {
    ms = navigator.appVersion.indexOf("MSIE");
    nc = navigator.appName.indexOf("Netscape");
    if (ms>=0) return "ms";
    else if (nc>=0) return "nc";
    else return false;
  }