function setupRollovers( rolloverClass ){
	if( rolloverClass == null ){
		rolloverClass = 'rollover';
	}
	$("."+rolloverClass).mouseover(function(){
		imageURL = this.src;
		this.src = imageURL.replace(/(.*)(\.[gif|jpg|png]{3})/,"$1-ro$2");
	}).mouseout(function(){
		imageURL = this.src;
		this.src = imageURL.replace(/(.*)-ro(\.[gif|jpg|png]{3})/,"$1$2");
	});
}