bwName = navigator.appName;
bwVer = parseInt(navigator.appVersion);

if ( (bwName == "Netscape" && bwVer >= 3) || (bwName == "Microsoft Internet Explorer" && bwVer >= 4) ) version ="N4";
else version ="I3";

function Change(i,j) {
if (version == "N4") {
	Img = i
	ImgName = j
	document.images[Img].src = ImgName
}
}

function Return(j) {
if (version == "N4") {
	ImgName = j
	document.images[Img].src = ImgName
}
}

function doPreload(images){
  for(i = 0; i < images.length; i++){
    var img = new Image();
    img.src = images[i];
  }
}