//  preload images
var offImages = new Array();
offImages["home"]			= "/images/gen-y/home_off.gif";
offImages["forKids"]            = "/images/gen-y/forKids_off.gif";
offImages["forParents"]    = "/images/gen-y/forParents_off.gif";
offImages["immunization"] = "/images/gen-y/immunization_off.gif";

var ovrImages = new Array();
ovrImages["home"]			= "/images/gen-y/home_ovr.gif";
ovrImages["forKids"]            = "/images/gen-y/forKids_ovr.gif";
ovrImages["forParents"]    = "/images/gen-y/forParents_ovr.gif";
ovrImages["immunization"] = "/images/gen-y/immunization_ovr.gif";

var homeSwap = new Array();
homeSwap["forParentsOff"] = "/images/gen-y/center_content_04.gif";
homeSwap["forParentsOn"] = "/images/gen-y/forParents_bgOver.gif";
homeSwap["forKidsOff"] = "/images/gen-y/center_content_02.gif";
homeSwap["forKidsOn"] = "/images/gen-y/forKids_bgOver.gif";
homeSwap["forTicketsOff"] = "/images/gen-y/center_content_06.gif";
homeSwap["forTicketsOn"] = "/images/gen-y/forTickets_bgOver.gif";

function swap(image) {
  docImage = eval("document." + image);
  imageSrc = docImage.src;

  if (imageSrc.indexOf("off") != -1) {
    docImage.src = ovrImages[image];
  }
  else if (imageSrc.indexOf("ovr") != -1) {
    docImage.src = offImages[image];
  }
  else {
    docImage.src = offImages[image];
  }
}

//imageReady rollovers
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		immunizer_over = newImage("/images/gen-y/games_page/immunizer-over.jpg");
		memory_over = newImage("/images/gen-y/games_page/memory-over.gif");
		slide_over = newImage("/images/gen-y/games_page/slide-over.gif");
		servingsize_over = newImage("/images/gen-y/games_page/servingsize-over.gif");
		crossword_over = newImage("/images/gen-y/games_page/crossword-over.gif");
		print_btn = newImage("/images/gen-y/i_pledgePrint-over.gif");
		preloadFlag = true;
	}
}