typeconon = new Image(65, 11);
	typeconon.src = "images/nav/typecon-on.gif";
	registeron = new Image(66, 11);
	registeron.src = "images/nav/register-on.gif";
	informationon = new Image(37, 11);
	informationon.src = "images/nav/information-on.gif";
	sotaon = new Image(13, 11);
	sotaon.src = "images/nav/sota-on.gif";
	con = new Image(13, 11);
	con.src = "images/nav/c-on.gif";
	participantson = new Image(200, 15);
	participantson.src = "images/nav/sub/participants-on.gif";
	programon = new Image(200, 15);
	programon.src = "images/nav/sub/program-on.gif";
	workshopon = new Image(200, 15);
	workshopon.src = "images/nav/sub/workshop-on.gif";
	welcomeon = new Image(200, 15);
	welcomeon.src = "images/nav/sub/welcome-on.gif";
	vendorson = new Image(200, 15);
	vendorson.src = "images/nav/sub/vendors-on.gif";
	sponsorshipon = new Image(200, 15);
	sponsorshipon.src = "images/nav/sub/sponsorship-on.gif";
	advertisingon = new Image(200, 15);
	advertisingon.src = "images/nav/sub/advertising-on.gif";
	auctionon = new Image(200, 15);
	auctionon.src = "images/nav/sub/auction-on.gif";
	areaon = new Image(200, 15);
	areaon.src = "images/nav/sub/area-on.gif";
	volunteeron = new Image(200, 15);
	volunteeron.src = "images/nav/sub/volunteer-on.gif";
	mikeon = new Image(70, 70);
	mikeon.src = "images/sponsors/mike_on.jpg";


	typeconoff = new Image(65, 11);
	typeconoff.src = "images/nav/typecon-off.gif";
	registeroff = new Image(66, 11);
	registeroff.src = "images/nav/register-off.gif";
	informationoff = new Image(37, 11);
	informationoff.src = "images/nav/information-off.gif";
	sotaoff = new Image(13, 11);
	sotaoff.src = "images/nav/sota-off.gif";
	coff = new Image(13, 11);
	coff.src = "images/nav/c-off.gif";
	participantsoff = new Image(200, 15);
	participantsoff.src = "images/nav/sub/participants-off.gif";
	programoff = new Image(200, 15);
	programoff.src = "images/nav/sub/program-off.gif";
	workshopoff = new Image(200, 15);
	workshopoff.src = "images/nav/sub/workshop-off.gif";
	welcomeoff = new Image(200, 15);
	welcomeoff.src = "images/nav/sub/welcome-off.gif";
	vendorsoff = new Image(200, 15);
	vendorsoff.src = "images/nav/sub/vendors-off.gif";
	sponsorshipoff = new Image(200, 15);
	sponsorshipoff.src = "images/nav/sub/sponsorship-off.gif";
	advertisingoff = new Image(200, 15);
	advertisingoff.src = "images/nav/sub/advertising-off.gif";
	auctionoff = new Image(200, 15);
	auctionoff.src = "images/nav/sub/auction-off.gif";
	areaoff = new Image(200, 15);
	areaoff.src = "images/nav/sub/area-off.gif";
	volunteeroff = new Image(200, 15);
	volunteeroff.src = "images/nav/sub/volunteer-off.gif";
	mikeoff = new Image(70, 70);
	mikeoff.src = "images/sponsors/mike_off.jpg";

	function img_act(imgName) {
		imgOn = eval(imgName + "on.src");
		document [imgName].src = imgOn;
	}

	function img_inact(imgName) {
		imgOff = eval(imgName + "off.src");
		document [imgName].src = imgOff;
	}