if (document.images) {
	// Preload Main Navigation
	
	nav1a=new Image; nav1a.src="images/n_about1.gif";
	nav1b=new Image; nav1b.src="images/n_about2.gif";

	nav2a=new Image; nav2a.src="images/n_portfolio1.gif";
	nav2b=new Image; nav2b.src="images/n_portfolio2.gif";
	
	nav3a=new Image; nav3a.src="images/n_where1.gif";
	nav3b=new Image; nav3b.src="images/n_where2.gif";
	
	nav4a=new Image; nav4a.src="images/n_contact1.gif";
	nav4b=new Image; nav4b.src="images/n_contact2.gif";
}