function preloadNavimages() {
	window.onload = (
		'/images/nav/images/about_on.gif',
		'/images/nav/images/about_over.gif', 
		'/images/nav/images/contact_on.gif',
		'/images/nav/images/contact_over.gif',
		'/images/nav/images/portfolio_on.gif',
		'/images/nav/images/portfolio_over.gif',
		'/images/nav/images/projects_on.gif',
		'/images/nav/images/projects_over.gif',
		'/images/nav/images/services_on.gif',
		'/images/nav/images/services_over.gif');
}