(function($) {
	$('a img.buttons').hover(
		function () {
			this.originalSrc = $(this).attr('src');
			this.rolloverSrc = this.originalSrc.replace(new RegExp('(_on)?(\.gif|\.jpg|\.png)$'), "_on$2");
			this.rolloverImg = new Image;
			this.rolloverImg.src = this.rolloverSrc;
			$(this).attr('src',this.rolloverSrc);
		},
		function () {
			$(this).attr('src',this.originalSrc);
		}
	);
})(jQuery);