//
// Detect browser type and version
//
bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
if ((bName == "Netscape" && bVer >=3) || (bName == "Microsoft Internet Explorer" && bVer >=4)) br = "n3";
else br = "n2";

function imgActive(imgName) {
   if (br == "n3") {
      imgOn = eval(imgName + "_on.src");
      document[ imgName ].src = imgOn;
   }
}
function imgInactive(imgName) {
   if (br == "n3") {
      imgOff = eval(imgName + "_off.src");
      document[ imgName ].src = imgOff;
   }
}

var popupWin = null;
function popup( url ) {
   popupWin = window.open( url, "popup",  "width=630,height=470,resizable=1,scrollbars=yes,toolbar=yes, menubar=yes,status=yes,location=yes,margins=0" );
}