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

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

      if (version == "N4") {
	imenu1 = new Image();
	imenu1.src = "img/menu1b.gif"
	imenu2 = new Image();
	imenu2.src = "img/menu2b.gif"
	imenu3 = new Image();
	imenu3.src = "img/menu3b.gif"
	imenu4 = new Image();
	imenu4.src = "img/menu4b.gif"
      }

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

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