browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))

if (browser){
	toc1on = new Image () ;
	toc1on.src = "/nav-home-on.gif";
	toc2on = new Image () ;
	toc2on.src = "/nav-crew-on.gif";
	toc3on = new Image () ;
	toc3on.src = "/nav-boat-on.gif";
	toc4on = new Image () ;
	toc4on.src = "/nav-fishing-on.gif";
	toc5on = new Image () ;
	toc5on.src = "/nav-members-on.gif";
	toc6on = new Image () ;
	toc6on.src = "/nav-photos-on.gif";
	toc7on = new Image () ;
	toc7on.src = "/nav-contact-on.gif";
	toc8on = new Image () ;
	toc8on.src = "/nav-trip-on.gif";

	toc1off = new Image () ;
	toc1off.src = "/nav-home-off.gif";
	toc2off = new Image () ;
	toc2off.src = "/nav-crew-off.gif";
	toc3off = new Image () ;
	toc3off.src = "/nav-boat-off.gif";
	toc4off = new Image () ;
	toc4off.src = "/nav-fishing-off.gif";
	toc5off = new Image () ;
	toc5off.src = "/nav-members-off.gif";
	toc6off = new Image () ;
	toc6off.src = "/nav-photos-off.gif";
	toc7off = new Image () ;
	toc7off.src = "/nav-contact-off.gif";
	toc8off = new Image () ;
	toc8off.src = "/nav-trip-off.gif";
}

function img_act(imgName)  {
	if (browser)  {
	imgOn = eval(imgName + "on.src");
	document [imgName] .src = imgOn;
	}
}
function img_inact(imgName)  {
	if (browser)  {
	imgOff = eval(imgName + "off.src");
	document [imgName] .src = imgOff;
	}
}