nav_home_off = new Image();
nav_home_off.src = "img/nav-home-off.gif";
nav_home_on = new Image();
nav_home_on.src = "img/nav-home-on.gif";

nav_about_off = new Image();
nav_about_off.src = "img/nav-about-off.gif";
nav_about_on = new Image();
nav_about_on.src = "img/nav-about-on.gif";

nav_courses_off = new Image();
nav_courses_off.src = "img/nav-courses-off.gif";
nav_courses_on = new Image();
nav_courses_on.src = "img/nav-courses-on.gif";

nav_instructors_off = new Image();
nav_instructors_off.src = "img/nav-instructors-off.gif";
nav_instructors_on = new Image();
nav_instructors_on.src = "img/nav-instructors-on.gif";

nav_tuition_off = new Image();
nav_tuition_off.src = "img/nav-tuition-off.gif";
nav_tuition_on = new Image();
nav_tuition_on.src = "img/nav-tuition-on.gif";

nav_application_off = new Image();
nav_application_off.src = "img/nav-application-off.gif";
nav_application_on = new Image();
nav_application_on.src = "img/nav-application-on.gif";

nav_alumnae_off = new Image();
nav_alumnae_off.src = "img/nav-alumnae-off.gif";
nav_alumnae_on = new Image();
nav_alumnae_on.src = "img/nav-alumnae-on.gif";

nav_contact_off = new Image();
nav_contact_off.src = "img/nav-contact-off.gif";
nav_contact_on = new Image();
nav_contact_on.src = "img/nav-contact-on.gif";

function navChange(button,mode) {
	document[button].src = eval(button + "_" + mode + ".src");
}