$(document).ready(function(){
	jQuery.preloadimages = function() {
		for(var i = 0; i<arguments.length; i++) {
			jQuery("<img>").attr("src", arguments[i]);
		}
	}
	
	$.preloadimages("images/nav_laura_over.gif","images/nav_books_over.gif","images/nav_events_over.gif",
	"images/nav_contact_over.gif","images/nav_news_over.gif","images/nav_blog_over.gif","images/nav_etc_over.gif","images/triangle_over.gif",
	"images/triangle_over.gif");

	$('#laura').hover(function() {
		$(this).attr("src","images/nav_laura_over.gif");
			}, function() {
		$(this).attr("src","images/nav_laura.gif");
	});
	
	$('#books').hover(function() {
		$(this).attr("src","images/nav_books_over.gif");
			}, function() {
		$(this).attr("src","images/nav_books.gif");
	});
	
	$('#events').hover(function() {
		$(this).attr("src","images/nav_events_over.gif");
			}, function() {
		$(this).attr("src","images/nav_events.gif");
	});
	
	$('#contact').hover(function() {
		$(this).attr("src","images/nav_contact_over.gif");
			}, function() {
		$(this).attr("src","images/nav_contact.gif");
	});
	
	$('#news').hover(function() {
		$(this).attr("src","images/nav_news_over.gif");
			}, function() {
		$(this).attr("src","images/nav_news.gif");
	});
	
	$('#blog').hover(function() {
		$(this).attr("src","images/nav_blog_over.gif");
			}, function() {
		$(this).attr("src","images/nav_blog.gif");
	});
	
	$('#etc').hover(function() {
		$(this).attr("src","images/nav_etc_over.gif");
			}, function() {
		$(this).attr("src","images/nav_etc.gif");
	});
	
	$('#backtotop').hover(function() {
		$(this).attr("src","images/triangle_over.gif");
			}, function() {
		$(this).attr("src","images/triangle.gif");
	});
});