var Critters = function() {
	return {
		el: null,
		images: null,
		interval: 2000,
		setImages: function( images ) {
			var i;
			this.el = document.getElementById('crittersImage');
			this.images = images;
			if( images.length > 0 ) {
				for( i = 0; i < images.length; i++ ) {
					new Image().src = images[i];
				}
				setInterval('Critters.nextImage()', this.interval);
			}
		},
		nextImage: function() {
			var i = Math.floor(Math.random() * this.images.length);
			this.el.src = this.images[i];
		}
	}
}();