isIE = document.all;
isNN = document.layers;


var studioarts_off = new Image();
studioarts_off.src = 'images/nav_studioarts_off.gif';
var studioarts_on = new Image();
studioarts_on.src = 'images/nav_studioarts_on.gif';

var studioarts_faculty_off = new Image();
studioarts_faculty_off.src = 'images/nav_sub_faculty_off.gif';
var studioarts_faculty_on = new Image();
studioarts_faculty_on.src = 'images/nav_sub_faculty_on.gif';

var studioarts_gallery_off = new Image();
studioarts_gallery_off.src = 'images/nav_sub_gallery_off.gif';
var studioarts_gallery_on = new Image();
studioarts_gallery_on.src = 'images/nav_sub_gallery_on.gif';

var studioarts_courses_off = new Image();
studioarts_courses_off.src = 'images/nav_sub_courses_off.gif';
var studioarts_courses_on = new Image();
studioarts_courses_on.src = 'images/nav_sub_courses_on.gif';

var studioarts_slib_off = new Image();
studioarts_slib_off.src = 'images/nav_sub_slidlib_off.gif';
var studioarts_slib_on = new Image();
studioarts_slib_on.src = 'images/nav_sub_slidlib_on.gif';

var studioarts_req_off = new Image();
studioarts_req_off.src = 'images/nav_sub_req_off.gif';
var studioarts_req_on = new Image();
studioarts_req_on.src = 'images/nav_sub_req_on.gif';

var arthistory_off = new Image();
arthistory_off.src = 'images/nav_arthist_off.gif';
var arthistory_on = new Image();
arthistory_on.src = 'images/nav_arthist_on.gif';

var performingarts_off = new Image();
performingarts_off.src = 'images/nav_perarts_off.gif';
var performingarts_on = new Image();
performingarts_on.src = 'images/nav_perarts_on.gif';

var pubspeaking_off = new Image();
pubspeaking_off.src = 'images/nav_pubspk_off.gif';
var pubspeaking_on = new Image();
pubspeaking_on.src = 'images/nav_pubspk_on.gif';

var slidelib_off = new Image();
slidelib_off.src = 'images/nav_slib_off.gif';
var slidelib_on = new Image();
slidelib_on.src = 'images/nav_slib_on.gif';

var artgallery_off = new Image();
artgallery_off.src = 'images/nav_artgal_off.gif';
var artgallery_on = new Image();
artgallery_on.src = 'images/nav_artgal_on.gif';


/////////////////////////////

var bodynav_sa_faculty_off = new Image();
bodynav_sa_faculty_off.src = 'images/bodynav_sa_faculty_off.jpg';
var bodynav_sa_faculty_on = new Image();
bodynav_sa_faculty_on.src = 'images/bodynav_sa_faculty_on.gif';

var bodynav_sa_gallery_off = new Image();
bodynav_sa_gallery_off.src = 'images/bodynav_sa_gallery_off.jpg';
var bodynav_sa_gallery_on = new Image();
bodynav_sa_gallery_on.src = 'images/bodynav_sa_gallery_on.gif';

var bodynav_sa_courses_off = new Image();
bodynav_sa_courses_off.src = 'images/bodynav_sa_courses_off.jpg';
var bodynav_sa_courses_on = new Image();
bodynav_sa_courses_on.src = 'images/bodynav_sa_courses_on.gif';

var bodynav_sa_reqs_off = new Image();
bodynav_sa_reqs_off.src = 'images/bodynav_sa_reqs_off.jpg';
var bodynav_sa_reqs_on = new Image();
bodynav_sa_reqs_on.src = 'images/bodynav_sa_reqs_on.gif';

var bodynav_studioarts_off = new Image();
bodynav_studioarts_off.src = 'images/bodynav_studioarts_off.jpg';
var bodynav_studioarts_on = new Image();
bodynav_studioarts_on.src = 'images/bodynav_studioarts_on.jpg';

var bodynav_arthistory_off = new Image();
bodynav_arthistory_off.src = 'images/bodynav_arthistory_off.jpg';
var bodynav_arthistory_on = new Image();
bodynav_arthistory_on.src = 'images/bodynav_arthistory_on.jpg';

var bodynav_perform_off = new Image();
bodynav_perform_off.src = 'images/bodynav_perform_off.jpg';
var bodynav_perform_on = new Image();
bodynav_perform_on.src = 'images/bodynav_perform_on.jpg';

////////////////////////////

var gate_main_studioarts_off = new Image();
gate_main_studioarts_off.src = 'images/gate_main_studioarts_off.jpg';
var gate_main_studioarts_on = new Image();
gate_main_studioarts_on.src = 'images/gate_main_studioarts_on.jpg';

var gate_main_arthist_off = new Image();
gate_main_arthist_off.src = 'images/gate_main_arthist_off.jpg';
var gate_main_arthist_on = new Image();
gate_main_arthist_on.src = 'images/gate_main_arthist_on.jpg';

var gate_main_perform_off = new Image();
gate_main_perform_off.src = 'images/gate_main_perform_off.jpg';
var gate_main_perform_on = new Image();
gate_main_perform_on.src = 'images/gate_main_perform_on.jpg';

  
function rollOn(imgname) {
	if (imgname == "") {
		return;	
	}
	if (isNN) {
  	document.images[imgname].src = eval(imgname + '_on.src');
  } else {
		document.images[imgname].src = eval(imgname + '_on.src');
	}
}
    
function rollOff(imgname) {
	if (imgname == "") {
		return;	
	}
	if (isNN) {
  	document.images[imgname].src = eval(imgname + '_off.src');
  } else {
		document.images[imgname].src = eval(imgname + '_off.src');
	}
}