function initRollOver(imgID, src) {

	var img = document.getElementById(imgID);	
	img.rollImage = new Image();
	img.rollImage.src = src;
	img.origSrc = img.src;
	img.onmouseover = function() {this.src = this.rollImage.src}
	img.onmouseout = function() {this.src = this.origSrc}
	
}