$(document).ready(function(){
	preloadImages();
	$("#nav-container li").hover(
		function(){$(this).addClass("nav-over");$(this).removeClass("nav-out");},
		function(){$(this).addClass("nav-out");$(this).removeClass("nav-over");}
	);
	$(".img-btn").hover(
		function(){$(this).attr("src",$(this).attr("src").replace(".jpg","-over.jpg")); },
		function(){$(this).attr("src",$(this).attr("src").replace("-over.jpg",".jpg")); }
	);
						   
});
		
function preloadImages(){
	if(document.images){
		var imgs = new Array();	
		imgs[0] = getImage("/library/media/thumbs/btn-payment.jpg");
		imgs[1] = getImage("/library/media/thumbs/btn-payment-over.jpg");
		imgs[2] = getImage("/library/media/thumbs/btn-membership.jpg");
		imgs[3] = getImage("/library/media/thumbs/btn-membership-over.jpg");
	}
	
}

function getImage(imgUrl){
	var img = new Image()
	img.src = imgUrl;
	return img;
}