var homeOn = new Image();
   homeOn.src = '/images/nav/home_on.gif';
var homeOff = new Image();
   homeOff.src = '/images/nav/home.gif';
var pstudentsOn = new Image();
   pstudentsOn.src = '/images/nav/pstudents_on.gif';
var pstudentsOff = new Image();
   pstudentsOff.src = '/images/nav/pstudents.gif';
var cstudentsOn = new Image();
   cstudentsOn.src = '/images/nav/cstudents_on.gif';
var cstudentsOff = new Image();
   cstudentsOff.src = '/images/nav/cstudents.gif';
var alumniOn = new Image();
   alumniOn.src = '/images/nav/alumni_on.gif';
var alumniOff = new Image();
   alumniOff.src = '/images/nav/alumni.gif';
var departmentsOn = new Image();
   departmentsOn.src = '/images/nav/departments_on.gif';
var departmentsOff = new Image();
   departmentsOff.src = '/images/nav/departments.gif';
var facultyOn = new Image();
   facultyOn.src = '/images/nav/faculty_on.gif';
var facultyOff = new Image();
   facultyOff.src = '/images/nav/faculty.gif';
var calendarOn = new Image();
   calendarOn.src = '/images/nav/calendar_on.gif';
var calendarOff = new Image();
   calendarOff.src = '/images/nav/calendar.gif';  
var divisionsOn = new Image();
   divisionsOn.src = '/images/nav/divisions_on.gif';
var divisionsOff = new Image();
   divisionsOff.src = '/images/nav/divisions.gif';  
var givingOn = new Image();
   givingOn.src = '/images/nav/giving_on.gif';
var givingOff = new Image();
   givingOff.src = '/images/nav/giving.gif';
var snfaidOn = new Image();
   snfaidOn.src = '/images/nav/sn_faid_on.gif';
var snfaidOff = new Image();
   snfaidOff.src = '/images/nav/sn_faid.gif'; 
var snlibraryOn = new Image();
   snlibraryOn.src = '/images/nav/sn_library_on.gif';
var snlibraryOff = new Image();
   snlibraryOff.src = '/images/nav/sn_library.gif'; 
var snaboutOn = new Image();
   snaboutOn.src = '/images/nav/sn_about_on.gif';
var snaboutOff = new Image();
   snaboutOff.src = '/images/nav/sn_about.gif'; 
 var sncadminOn = new Image();
   sncadminOn.src = '/images/nav/sn_cadmin_on.gif';
var sncadminOff = new Image();
   sncadminOff.src = '/images/nav/sn_cadmin.gif';
 var snpressnolOn = new Image();
   snpressnolOn.src = '/images/nav/sn_pressnol_on.gif';
var snpressnolOff = new Image();
   snpressnolOff.src = '/images/nav/sn_pressnol.gif'; 
   var hpsnfaidOn = new Image();
   hpsnfaidOn.src = '/images/nav/hpsn_faid_on.gif';
var hpsnfaidOff = new Image();
   hpsnfaidOff.src = '/images/nav/hpsn_faid.gif'; 
var hpsnlibraryOn = new Image();
   hpsnlibraryOn.src = '/images/nav/hpsn_library_on.gif';
var hpsnlibraryOff = new Image();
   hpsnlibraryOff.src = '/images/nav/hpsn_library.gif'; 
var hpsnaboutOn = new Image();
   hpsnaboutOn.src = '/images/nav/hpsn_about_on.gif';
var hpsnaboutOff = new Image();
   hpsnaboutOff.src = '/images/nav/hpsn_about.gif'; 
 var hpsncadminOn = new Image();
   hpsncadminOn.src = '/images/nav/hpsn_cadmin_on.gif';
var hpsncadminOff = new Image();
   hpsncadminOff.src = '/images/nav/hpsn_cadmin.gif';
 var hpsnpressnolOn = new Image();
   hpsnpressnolOn.src = '/images/nav/hpsn_pressnol_on.gif';
var hpsnpressnolOff = new Image();
   hpsnpressnolOff.src = '/images/nav/hpsn_pressnol.gif'; 
var hpsnhrOn = new Image();
   hpsnhrOn.src = '/images/nav/hpsn_hr_on.gif';
var hpsnhrOff = new Image();
   hpsnhrOff.src = '/images/nav/hpsn_hr.gif'; 
var snhrOn = new Image();
   snhrOn.src = '/images/nav/sn_hr_on.gif';
var snhrOff = new Image();
   snhrOff.src = '/images/nav/sn_hr.gif';    
   
   
   function on(img){
   document[img].src = eval(img + 'On').src;
   }
   
   function off(img){
   document[img].src = eval(img + 'Off').src;
   }