if (document.images) {
	// Preload Main Navigation
	nav0a=new Image; nav0a.src="images/n_about_us1.gif";
	nav0b=new Image; nav0b.src="images/n_about_us2.gif";
	
	nav1a=new Image; nav1a.src="images/n_services1.gif";
	nav1b=new Image; nav1b.src="images/n_services2.gif";
	
	nav2a=new Image; nav2a.src="images/n_patient_amenities1.gif";
	nav2b=new Image; nav2b.src="images/n_patient_amenities2.gif";
		
	nav3a=new Image; nav3a.src="images/n_testimonials1.gif";
	nav3b=new Image; nav3b.src="images/n_testimonials2.gif";
	
	nav4a=new Image; nav4a.src="images/n_smile_gallery1.gif";
	nav4b=new Image; nav4b.src="images/n_smile_gallery2.gif";
	
	nav5a=new Image; nav5a.src="images/n_contact_us1.gif";
	nav5b=new Image; nav5b.src="images/n_contact_us2.gif";
}