var ver4 = (navigator.appVersion.charAt(0) == "4");
var NN4  = ver4 && (navigator.appName == "Netscape");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NN3 = ((navigator.appVersion.charAt(0) == "3") && (navigator.appName == "Netscape"));
var Moz = ((navigator.appVersion.charAt(0) == "5") && (navigator.appName == "Netscape"));

var ImgDir="../res/";

function SwapImage(name,state) {
  if (NN3 || NN4 || Moz || IE4) document.images[name].src = ImgDir + name + state + ".jpg";
}

function SwapImage_gif(name,state) {
  if (NN3 || NN4 || Moz || IE4) document.images[name].src = ImgDir + name + state + ".gif";
}