$(document).ready(function(){
	jQuery.preloadimages = function() {
		for(var i = 0; i<arguments.length; i++) {
			jQuery("<img>").attr("src", arguments[i]);
		}
	}
	
	$.preloadimages("images/nav-helen-over.gif", "images/nav-qa-over.gif", "images/nav-news-over.gif",
					"images/nav-books-over.gif", "images/nav-contact-over.gif", "images/nav-writings-over.gif", "images/nav-germany-over.gif", "images/nav-blog-over.gif");

	$('#helen').hover(function() {
		$(this).attr("src","images/nav-helen-over.gif");
			}, function() {
		$(this).attr("src","images/nav-helen.gif");
	});
	
	$('#qa').hover(function() {
		$(this).attr("src","images/nav-qa-over.gif");
			}, function() {
		$(this).attr("src","images/nav-qa.gif");
	});
	
	$('#books').hover(function() {
		$(this).attr("src","images/nav-books-over.gif");
			}, function() {
		$(this).attr("src","images/nav-books.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");
	});
	
	$('#writings').hover(function() {
		$(this).attr("src","images/nav-writings-over.gif");
			}, function() {
		$(this).attr("src","images/nav-writings.gif");
	});
	
	$('#germany').hover(function() {
		$(this).attr("src","images/nav-germany-over.gif");
			}, function() {
		$(this).attr("src","images/nav-germany.gif");
	});
	
	$('#blog').hover(function() {
		$(this).attr("src","images/nav-blog-over.gif");
			}, function() {
		$(this).attr("src","images/nav-blog.gif");
	});

});