// Preloads the images used for rollover navigation
preloadImages();

/* Preloads images for rollovers */
function preloadImages() {

	homenav_home_on = new Image();
	homenav_home_off = new Image();
	homenav_schedule_on = new Image();
	homenav_schedule_off = new Image();
	homenav_video_on = new Image();
	homenav_video_off = new Image();
	homenav_shows_on = new Image();
	homenav_shows_off = new Image();
	homenav_where_on = new Image();
	homenav_where_off = new Image();
	homenav_blog_on = new Image();
	homenav_blog_off = new Image()
	
	nav_home_on = new Image();
	nav_home_off = new Image();
	nav_schedule_on = new Image();
	nav_schedule_off = new Image();
	nav_video_on = new Image();
	nav_video_off = new Image();
	nav_shows_on = new Image();
	nav_shows_off = new Image();
	nav_where_on = new Image();
	nav_where_off = new Image();
	nav_blog_on = new Image();
	nav_blog_off = new Image();
	
	
	homenav_home_on.src = "/site/smithsonian/images/nav/home_over.jpg";
	homenav_home_off.src = "/site/smithsonian/images/nav/home_off.jpg";
	homenav_schedule_on.src = "/site/smithsonian/images/nav/schedule_over.jpg";
	homenav_schedule_off.src = "/site/smithsonian/images/nav/schedule_off.jpg";
	homenav_video_on.src = "/site/smithsonian/images/nav/video_over.jpg";
	homenav_video_off.src = "/site/smithsonian/images/nav/video_off.jpg";
	homenav_shows_on.src = "/site/smithsonian/images/nav/show_over.jpg";
	homenav_shows_off.src = "/site/smithsonian/images/nav/show_off.jpg";
	homenav_where_on.src = "/site/smithsonian/images/nav/where_over.jpg";
	homenav_where_off.src = "/site/smithsonian/images/nav/where_off.jpg";
	homenav_blog_on.src = "/site/smithsonian/images/nav/blog_over.jpg";
	homenav_blog_off.src = "/site/smithsonian/images/nav/blog_off.jpg";
	

	nav_home_on.src = "/site/smithsonian/images/nav/home_over.jpg";
	nav_home_off.src = "/site/smithsonian/images/nav/home_off.jpg";
	nav_schedule_on.src = "/site/smithsonian/images/nav/schedule_over.jpg";
	nav_schedule_off.src = "/site/smithsonian/images/nav/schedule_off.jpg";
	nav_video_on.src = "/site/smithsonian/images/nav/video_over.jpg";
	nav_video_off.src = "/site/smithsonian/images/nav/video_off.jpg";
	nav_shows_on.src = "/site/smithsonian/images/nav/show_over.jpg";
	nav_shows_off.src = "/site/smithsonian/images/nav/show_off.jpg";
	nav_blog_on.src = "/site/smithsonian/images/nav/blog_over.jpg";
	nav_blog_off.src = "/site/smithsonian/images/nav/blog_off.jpg";
	nav_where_on.src = "/site/smithsonian/images/nav/where_over.jpg";
	nav_where_off.src = "/site/smithsonian/images/nav/where_off.jpg";
}

function showOverState(button_name) {

	$(button_name).src = eval ( button_name + "_on.src" );
}

function hideOverState(button_name) {

	$(button_name).src = eval ( button_name + "_off.src" );	
}