if (document.images){
     sub1off= new Image(49,16);
     sub1off.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/welcome-0.gif";
     sub1on= new Image(49,16); 
     sub1on.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/welcome-1.gif"; 
     
     sub2off= new Image(95,16);
     sub2off.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/abouttheschool-0.gif";
     sub2on= new Image(95,16); 
     sub2on.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/abouttheschool-1.gif";
     
     sub3off= new Image(111,16);
     sub3off.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/websiteinformation-0.gif";
     sub3on= new Image(111,16); 
     sub3on.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/websiteinformation-1.gif";
     
     sub4off= new Image(100,16);
     sub4off.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/unswvirtualtour-0.gif";
     sub4on= new Image(100,16); 
     sub4on.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/unswvirtualtour-1.gif";
     
     sub5off= new Image(82,16);
     sub5off.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/contactdetails-0.gif";
     sub5on= new Image(82,16); 
     sub5on.src="/system/modules/au.edu.unsw.cse.new/resources/submenu/about/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;
   }
}