$(document).ready(function () {
	
	// Preload image rollovers
	$("img.rollover").each(function() {
		this.out = $(this).attr("src");
		
		// Assumes all 'active' images are named foobar-over.ext
		name_split = this.out.split('.');
		name_split[name_split.length-2] += "-over";
		this.on = name_split.join('.');
		
		// Preload
		$("<img>").attr("src", this.on);
	});
	
	// Navigation rollovers
	$("img.rollover").mouseover(function(){
		$(this).attr("src", this.on);
	});
	
	$("img.rollover").mouseout(function(){
		$(this).attr("src", this.out);
	});
});