if (document.images) {
	// nav images directory
	var dirNav = "../_ui/nav/";
	
	// normal state
	academyprograms = new Image();
	academyprograms.src = dirNav + "academyprograms.gif";
	facultyandstaff = new Image();
	facultyandstaff.src = dirNav + "facultyandstaff.gif";
	students = new Image();
	students.src = dirNav + "students.gif";
	committeesandadvisory = new Image();
	committeesandadvisory.src = dirNav + "committeesandadvisory.gif";
	courses = new Image();
	courses.src = dirNav + "courses.gif";
	contactus = new Image();
	contactus.src = dirNav + "contactus.gif";
	
	// mouseover state
	academyprograms_o = new Image();
	academyprograms_o.src = dirNav + "academyprograms_o.gif";
	facultyandstaff_o = new Image();
	facultyandstaff_o.src = dirNav + "facultyandstaff_o.gif";
	students_o = new Image();
	students_o.src = dirNav + "students_o.gif";
	committeesandadvisory_o = new Image();
	committeesandadvisory_o.src = dirNav + "committeesandadvisory_o.gif";
	courses_o = new Image();
	courses_o.src = dirNav + "courses_o.gif";
	contactus_o = new Image();
	contactus_o.src = dirNav + "contactus_o.gif";
	
	// frontpage submenu dir
	var dirSubmenu = "../_ui/front-submenu/";
	
	// normal state
	messagefromthedean = new Image();
	messagefromthedean.src = dirSubmenu + "messagefromthedean.gif";
	missionstatement = new Image();
	missionstatement.src = dirSubmenu + "missionstatement.gif";
	lectureseriesandevents = new Image();
	lectureseriesandevents.src = dirSubmenu + "lectureseriesandevents.gif";
	predoctoralfellow = new Image();
	predoctoralfellow.src = dirSubmenu + "predoctoralfellow.gif";
	outreach = new Image();
	outreach.src = dirSubmenu + "outreach.gif";
	friendsofanws = new Image();
	friendsofanws.src = dirSubmenu + "friendsofanws.gif";
	studyabroadprogram = new Image();
	studyabroadprogram.src = dirSubmenu + "studyabroadprogram.gif";
	publications = new Image();
	publications.src = dirSubmenu + "publications.gif";
	archive = new Image();
	archive.src = dirSubmenu + "archive.gif";
	diaspora = new Image();
	diaspora.src = dirSubmenu + "diaspora.gif";
	studies = new Image();
	studies.src = dirSubmenu + "studies.gif";
	
	// mouseover state
	messagefromthedean_o = new Image();
	messagefromthedean_o.src = dirSubmenu + "messagefromthedean_o.gif";
	missionstatement_o = new Image();
	missionstatement_o.src = dirSubmenu + "missionstatement_o.gif";
	lectureseriesandevents_o = new Image();
	lectureseriesandevents_o.src = dirSubmenu + "lectureseriesandevents_o.gif";
	predoctoralfellow_o = new Image();
	predoctoralfellow_o.src = dirSubmenu + "predoctoralfellow_o.gif";
	outreach_o = new Image();
	outreach_o.src = dirSubmenu + "outreach_o.gif";
	friendsofanws_o = new Image();
	friendsofanws_o.src = dirSubmenu + "friendsofanws_o.gif";
	studyabroadprogram_o = new Image();
	studyabroadprogram_o.src = dirSubmenu + "studyabroadprogram_o.gif";
	publications_o = new Image();
	publications_o.src = dirSubmenu + "publications_o.gif";
	archive_o = new Image();
	archive_o.src = dirSubmenu + "archive_o.gif";
	diaspora_o = new Image();
	diaspora_o.src = dirSubmenu + "diaspora_o.gif";
	studies_o = new Image();
	studies_o.src = dirSubmenu + "studies_o.gif";
}

function imgOn(imgName) {
	if (document.images) document[imgName].src = eval(imgName + "_o.src");
}

function imgOff(imgName) {
	if (document.images) document[imgName].src = eval(imgName + ".src");
}