function preload_rollover( )
{
	images = new Array( );
	images[images.length] = "images/header/about_us_h.jpg"
	images[images.length] = "images/header/sessions_h.jpg"
	images[images.length] = "images/header/help_h.jpg"
	images[images.length] = "images/header/contact_h.jpg"

	images[images.length] = "images/footer/about_us_h.jpg"
	images[images.length] = "images/footer/sessions_h.jpg"
	images[images.length] = "images/footer/sign_up_h.jpg"
	images[images.length] = "images/footer/join_NCT_h.jpg"
	images[images.length] = "images/footer/session_demo_h.jpg"
	images[images.length] = "images/footer/help_h.jpg"
	images[images.length] = "images/footer/contact_h.jpg"
	
	images[images.length] = "images/sessions/rollover.gif"
	
	imageObj = new Array( );
	var i;
	for( i = 0; i < images.length; i++ )
	{
		imageObj[i] = new Image( );
		imageObj[i].src = images[i];
	}
}