if (document.images) {
	// Preload Main Navigation
	subnav1a=new Image; subnav1a.src="images/n_home_students_1.gif";
	subnav1b=new Image; subnav1b.src="images/n_home_students_2.gif";

	subnav2a=new Image; subnav2a.src="images/n_home_proctors_1.gif";
	subnav2b=new Image; subnav2b.src="images/n_home_proctors_2.gif";
}