$(function(){
	$("img[@ref=over]")
		.mouseover(function () {
			this.src = this.src.replace(/^(.+)(.[a-z]+)$/, "$1_over$2");
		})
		.mouseout(function () {
			this.src = this.src.replace(/^(.+)_over(.[a-z]+)$/, "$1$2");
		})
		.each(function () {
			this.preloaded = new Image;
			this.preloaded.src = this.src.replace(/^(.+)(.[a-z]+)$/, "$1_over$2");
	});
});