menu11=new Image();
menu12=new Image();
menu21=new Image();
menu22=new Image();
menu31=new Image();
menu32=new Image();
menu41=new Image();
menu42=new Image();
menu51=new Image();
menu52=new Image();
menu61=new Image();
menu62=new Image();
menu71=new Image();
menu72=new Image();
menu81=new Image();
menu82=new Image();
menu91=new Image();
menu92=new Image();

menu11.src='icon/11u.gif';
menu12.src='icon/12u.gif';
menu21.src='icon/11u.gif';
menu22.src='icon/12u.gif';
menu31.src='icon/11u.gif';
menu32.src='icon/12u.gif';
menu41.src='icon/11u.gif';
menu42.src='icon/12u.gif';
menu51.src='icon/11u.gif';
menu52.src='icon/12u.gif';
menu61.src='icon/11u.gif';
menu62.src='icon/12u.gif';
menu71.src='icon/11u.gif';
menu72.src='icon/12u.gif';
menu81.src='icon/11u.gif';
menu82.src='icon/12u.gif';
menu91.src='icon/11u.gif';
menu92.src='icon/12u.gif';

function revdisp(n) {
   if (n==11) document.images[0].src='icon/11u.gif'
   if (n==12) document.images[1].src='icon/12u.gif'
   if (n==21) document.images[2].src='icon/11u.gif'
   if (n==22) document.images[3].src='icon/12u.gif'
   if (n==31) document.images[4].src='icon/11u.gif'
   if (n==32) document.images[5].src='icon/12u.gif'
   if (n==41) document.images[6].src='icon/11u.gif'
   if (n==42) document.images[7].src='icon/12u.gif'
   if (n==51) document.images[8].src='icon/11u.gif'
   if (n==52) document.images[9].src='icon/12u.gif'
   if (n==61) document.images[10].src='icon/11u.gif'
   if (n==62) document.images[11].src='icon/12u.gif'
   if (n==71) document.images[12].src='icon/11u.gif'
   if (n==72) document.images[13].src='icon/12u.gif'
   if (n==81) document.images[14].src='icon/11u.gif'
   if (n==82) document.images[15].src='icon/12u.gif'
   if (n==91) document.images[16].src='icon/11u.gif'
   if (n==92) document.images[17].src='icon/12u.gif'
}

function display(n) {
   if (n==11) document.images[0].src='icon/11d.gif'
   if (n==12) document.images[1].src='icon/12d.gif'
   if (n==21) document.images[2].src='icon/11d.gif'
   if (n==22) document.images[3].src='icon/12d.gif'
   if (n==31) document.images[4].src='icon/11d.gif'
   if (n==32) document.images[5].src='icon/12d.gif'
   if (n==41) document.images[6].src='icon/11d.gif'
   if (n==42) document.images[7].src='icon/12d.gif'
   if (n==51) document.images[8].src='icon/11d.gif'
   if (n==52) document.images[9].src='icon/12d.gif'
   if (n==61) document.images[10].src='icon/11d.gif'
   if (n==62) document.images[11].src='icon/12d.gif'
   if (n==71) document.images[12].src='icon/11d.gif'
   if (n==72) document.images[13].src='icon/12d.gif'
   if (n==81) document.images[14].src='icon/11d.gif'
   if (n==82) document.images[15].src='icon/12d.gif'
   if (n==91) document.images[16].src='icon/11d.gif'
   if (n==92) document.images[17].src='icon/12d.gif'
}