function getImg(obj) {
	if (document.getElementById){
		return document.getElementById(obj);
	} else {
		return document[obj];
	}
}
function preLoad() {
	nameArray = new Array();
	for (i=0; i<arguments.length; i++) {
		nameArray[nameArray.length] = arguments[i];
	}
	imageArray = new Array();
	for (nameObj in nameArray) {
		theId = nameArray[nameObj];
		theId = theId.replace(/[^-]*-/,'');
		imageArray[theId] = new Array();
		imageArray[theId][0] = new Image();
		imageArray[theId][1] = new Image();
		imageArray[theId][0].src = 'images/' + nameArray[nameObj] + '.jpg';
		imageArray[theId][1].src = 'images/' + nameArray[nameObj] + '-over.jpg';
		theImg = getImg(theId);
		theImg.alt = theId.toUpperCase();
		theImg.onmouseover = function () {
			this.src = (this.src==imageArray[this.id][0].src) ? imageArray[this.id][1].src:imageArray[this.id][0].src;
		}
		theImg.onmouseout = function () {
			this.src = (this.src==imageArray[this.id][0].src) ? imageArray[this.id][1].src:imageArray[this.id][0].src;
		}

	}
}
function rollOver(obj) {
	theImg = getImg(obj);
	theImg.src = (theImg.src==imageArray[obj][0].src) ? imageArray[obj][1].src:imageArray[obj][0].src;
}