function showRandomImage() {
	var numImages;
	var imageToShow;
	var imageArrary = new Array();
	imageArrary[0] = '../images/PIX_MC1.jpg'
	imageArrary[1] = '../images/PIX_MC2.jpg'
	imageArrary[2] = '../images/PIX_wj1.jpg'
	imageArrary[3] = '../images/PIX_wj2.jpg'
	imageArrary[4] = '../images/PIX_wj3.jpg'
	numImages = imageArrary.length;
	imageToShow = Math.round(Math.random()*(numImages-1));
	document.write('<img src="'+imageArrary[imageToShow]+'">');
}