function getAppVersion() {
appname= navigator.appName;
appversion = navigator.appVersion;
majorver = appversion.substring(0, 1); 

	if ((appname == "Netscape" || appname == "Microsoft Internet Explorer") && ( majorver >= 3 )) 
	return 1;
	
	if ((appname == "Microsoft Internet Explorer") && (majorver >= 4)) 
	return 1;
	return 0;

}

function swtch(num, imgname) {

	if (getAppVersion()) {
	imgname.src = img[num].src;
	}

}

imgsrc = new Array();
imgsrc[0] = "test/TDLA_files/schedule.gif";
imgsrc[1] = "test/TDLA_files/schedule-ON.gif";
imgsrc[2] = "test/TDLA_files/productions.gif";
imgsrc[3] = "test/TDLA_files/productions-ON.gif";
imgsrc[4] = "test/TDLA_files/tickets.gif";
imgsrc[5] = "test/TDLA_files/tickets-ON.gif";
imgsrc[6] = "test/TDLA_files/education.gif";
imgsrc[7] = "test/TDLA_files/education-ON.gif";
imgsrc[8] = "test/TDLA_files/neighborhood.gif";
imgsrc[9] = "test/TDLA_files/neighborhood-ON.gif";
imgsrc[10] = "test/TDLA_files/support.gif";
imgsrc[11] = "test/TDLA_files/support-ON.gif";
imgsrc[12] = "test/TDLA_files/opportunities.gif";
imgsrc[13] = "test/TDLA_files/opportunities-ON.gif";
imgsrc[14] = "test/TDLA_files/about.gif";
imgsrc[15] = "test/TDLA_files/about-ON.gif";
imgsrc[16] = "test/TDLA_files/contact.gif";
imgsrc[17] = "test/TDLA_files/contact-ON.gif";
imgsrc[18] = "test/TDLA_files/home.gif";
imgsrc[19] = "test/TDLA_files/home-ON.gif";
imgsrc[20] = "test/TDLA_files/espanol.gif";
imgsrc[21] = "test/TDLA_files/espanol-ON.gif";
imgsrc[22] = "test/TDLA_files/tours.gif";
imgsrc[23] = "test/TDLA_files/tours-ON.gif";

if (getAppVersion()) {
img = new Array();

	for (i = 0; i < imgsrc.length; i++) {
	img[i] = new Image();
	img[i].src = imgsrc[i];
	}

}