if (document.images) {
	
// ## ROLLOVER IMAGES ##
	
	//NAV
	abouton = new Image();
	abouton.src = images_dir+"/nav_about_over.gif";
	accounton = new Image();
	accounton.src = images_dir+"/nav_account_over.gif";
	bookson = new Image();
	bookson.src = images_dir+"/nav_books_over.gif";
	gadgetson = new Image();
	gadgetson.src = images_dir+"/nav_gadgets_over.gif";
	gameson = new Image();
	gameson.src = images_dir+"/nav_games_over.gif";
	helpon = new Image();
	helpon.src = images_dir+"/nav_help_over.gif";
	loginon = new Image();
	loginon.src = images_dir+"/nav_login_over.gif";
	movieson = new Image();
	movieson.src = images_dir+"/nav_movies_over.gif";
	musicon = new Image();
	musicon.src = images_dir+"/nav_music_over.gif";

// ## ROLLOUT IMAGE ##
        
        //NAV
	aboutoff = new Image();
	aboutoff.src = images_dir+"/nav_about_out.gif";
	accountoff = new Image();
	accountoff.src = images_dir+"/nav_account_out.gif";
	booksoff = new Image();
	booksoff.src = images_dir+"/nav_books_out.gif";
	gadgetsoff = new Image();
	gadgetsoff.src = images_dir+"/nav_gadgets_out.gif";
	gamesoff = new Image();
	gamesoff.src = images_dir+"/nav_games_out.gif";
	helpoff = new Image();
	helpoff.src = images_dir+"/nav_help_out.gif";
	loginoff = new Image();
	loginoff.src = images_dir+"/nav_login_out.gif";
	moviesoff = new Image();
	moviesoff.src = images_dir+"/nav_movies_out.gif";
	musicoff = new Image();
	musicoff.src = images_dir+"/nav_music_out.gif";

}

// Function to 'activate' images.
function imgOn(imgName) {
				 if (document.images) {
				 document[imgName].src = eval(imgName + "on.src");   
				 }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
        			document[imgName].src = eval(imgName + "off.src");
				}
}