// Navigation rollover mechanism
function navOff(imgId) {
	document.getElementById(imgId).src = "images/nav_" + imgId + "_off.gif";
}

function navOn(imgId) {
	document.getElementById(imgId).src = "images/nav_" + imgId + "_on.gif";
}
// End of navigation rollover mechanism

// Function that loads navigation
function loadNav() {
	if (document.images) {
	  nav_home_on = new Image(183 ,23); nav_home_on.src = "images/nav_home_on.gif";
	  nav_about_on = new Image(183 ,23); nav_about_on.src = "images/nav_about_on.gif";
	  nav_mus_on = new Image(183 ,23); nav_mus_on.src = "images/nav_mus_on.gif";
		nav_teach_on = new Image(183 ,23); nav_teach_on.src = "images/nav_teach_on.gif";
		nav_sched_on = new Image(183 ,23); nav_sched_on.src = "images/nav_sched_on.gif";
		nav_announ_on = new Image(183 ,23); nav_announ_on.src = "images/nav_announ_on.gif";
		nav_audit_on = new Image(183 ,23); nav_audit_on.src = "images/nav_audit_on.gif";
		nav_reg_on = new Image(183 ,23); nav_reg_on.src = "images/nav_reg_on.gif";
		nav_photos_on = new Image(183 ,23); nav_photos_on.src = "images/nav_photos_on.gif";
		nav_perf_on = new Image(183 ,23); nav_perf_on.src = "images/nav_perf_on.gif";
	  nav_press_on = new Image(183 ,23); nav_press_on.src = "images/nav_press_on.gif";
	  nav_articles_on = new Image(183 ,23); nav_articles_on.src = "images/nav_articles_on.gif";
		nav_don_on = new Image(183 ,23); nav_don_on.src = "images/nav_don_on.gif";
	  nav_contact_on = new Image(183 ,23); nav_contact_on.src = "images/nav_contact_on.gif";
	 }
}