if (document.images){
     sub1off= new Image(49,16);
     sub1off.src="/submenu/undergrad/welcome-0.gif";
     sub1on= new Image(49,16); 
     sub1on.src="/submenu/undergrad/welcome-1.gif"; 
     
     sub2off= new Image(55,16);
     sub2off.src="/submenu/undergrad/programs-0.gif";
     sub2on= new Image(55,16); 
     sub2on.src="/submenu/undergrad/programs-1.gif";
     
     sub3off= new Image(117,16);
     sub3off.src="/submenu/undergrad/prospectivestudents-0.gif";
     sub3on= new Image(117,16); 
     sub3on.src="/submenu/undergrad/prospectivestudents-1.gif";
     
     sub4off= new Image(92,16);
     sub4off.src="/submenu/undergrad/currentstudents-0.gif";
     sub4on= new Image(92,16); 
     sub4on.src="/submenu/undergrad/currentstudents-1.gif";

     sub5off= new Image(70,16);
     sub5off.src="/submenu/undergrad/scholarships-0.gif";
     sub5on= new Image(70,16); 
     sub5on.src="/submenu/undergrad/scholarships-1.gif";
     
     sub6off= new Image(82,16);
     sub6off.src="/submenu/undergrad/contactdetails-0.gif";
     sub6on= new Image(82,16); 
     sub6on.src="/submenu/undergrad/contactdetails-1.gif";
}

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

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