// define variables to hold the "on","off" menu buttons in cache
var imagePatOOff = new Image();
var imagePatOOn = new Image();
var imageJillOff = new Image();
var imageJillOn = new Image();
var imageWallyOff = new Image();
var imageWallyOn = new Image();
var imageJohnOff = new Image();
var imageJohnOn = new Image();

imagePatOOff.src = "images/pato.jpg"
imagePatOOn.src = "images/patohi.jpg"
imageJillOff.src = "images/jill.jpg"
imageJillOn.src = "images/jillhi.jpg"
imageWallyOff.src = "images/wally.jpg"
imageWallyOn.src = "images/wallyhi.jpg"
imageJohnOff.src = "images/john.jpg"
imageJohnOn.src = "images/johnhi.jpg"

function buttonRollover(img, src)	
{
	img.src = src;
}