/*
 *  random.js - Lindsay McLennan | UM Marketing Communications
 */
var numImgs = 3; /*set the number of images here*/
var DHTML = (document.getElementById || document.all || document.layers);

function getElement(id) {
	if (document.getElementById) return document.getElementById(id);
	else if (document.all) return document.all[id];
	else if (document.layers) return document.layers[id];
}

function loadRandom() {
	imgNum = 1 + Math.floor(Math.random() * numImgs);
	title = 'Click the image for more information';
	rImg = getElement('randomImg');
	rImg.src = 'images/intro/image' + imgNum + '.jpg';
	rImg.alt = title;
}	

if (DHTML) {
	for (i = 1; i <= numImgs; ++i) {
		preload = new Image();
		preload.src = 'images/intro/image' + i + '.jpg';
	}
	addLoadEvent(loadRandom);		
}