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

if (browser){
	toc1on = new Image () ;
	toc1on.src = "/menu-home-on.jpg";
	toc2on = new Image () ;
	toc2on.src = "/menu-boat-on.jpg";
	toc3on = new Image () ;
	toc3on.src = "/menu-charter-on.jpg";
	toc4on = new Image () ;
	toc4on.src = "/menu-species-on.jpg";
	toc5on = new Image () ;
	toc5on.src = "/menu-photos-on.jpg";
	toc6on = new Image () ;
	toc6on.src = "/menu-reports-on.jpg";
	toc7on = new Image () ;
	toc7on.src = "/menu-sponsors-on.jpg";
	toc8on = new Image () ;
	toc8on.src = "/menu-contact-on.jpg";

	toc1off = new Image () ;
	toc1off.src = "/menu-home-off.jpg";
	toc2off = new Image () ;
	toc2off.src = "/menu-boat-off.jpg";
	toc3off = new Image () ;
	toc3off.src = "/menu-charter-off.jpg";
	toc4off = new Image () ;
	toc4off.src = "/menu-species-off.jpg";
	toc5off = new Image () ;
	toc5off.src = "/menu-photos-off.jpg";
	toc6off = new Image () ;
	toc6off.src = "/menu-reports-off.jpg";
	toc7off = new Image () ;
	toc7off.src = "/menu-sponsors-off.jpg";
	toc8off = new Image () ;
	toc8off.src = "/menu-contact-off.jpg";
}

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;
	}
}