var seconds = 4;

function environment() {

	$('div#rbt-stu').fadeOut('slow');
	$('div#rbt-env').fadeIn('slow');

	setTimeout("student()", seconds * 1000);

}

function student() {

	$('div#rbt-eenv').fadeOut('slow');
	$('div#rbt-stu').fadeIn('slow'); // Show this one.

	setTimeout("environment()", seconds * 1000);

}

function existing() {

	$('div#rbt-stu').fadeOut('slow');
	$('div#rbt-exi').fadeIn('slow'); // Show this one.

	setTimeout("environment()", seconds * 1000); // Go to the next one.

}

$(document).ready(function() {

	setTimeout("student()", seconds * 1000);

});