if (document.images) {
	nav_home = new Image
	nav_home_over = new Image
     
	nav_home.src = 'images/nav_home.jpg'
	nav_home_over.src = 'images/nav_home_over.jpg'

	nav_services = new Image
	nav_services_over = new Image
     
	nav_services.src = 'images/nav_services.jpg'
	nav_services_over.src = 'images/nav_services_over.jpg'
	
	nav_company = new Image
	nav_company_over = new Image
     
	nav_company.src = 'images/nav_company.jpg'
	nav_company_over.src = 'images/nav_company_over.jpg'
	
	nav_news = new Image
	nav_news_over = new Image
     
	nav_news.src = 'images/nav_news.jpg'
	nav_news_over.src = 'images/nav_news_over.jpg'
	
	nav_careers = new Image
	nav_careers_over = new Image
     
	nav_careers.src = 'images/nav_careers.jpg'
	nav_careers_over.src = 'images/nav_careers_over.jpg'
	
	nav_contact = new Image
	nav_contact_over = new Image
     
	nav_contact.src = 'images/nav_contact.jpg'
	nav_contact_over.src = 'images/nav_contact_over.jpg'
}