<!--
myGifCnt = 12;             
myGifTbl = new Array(     
   "img/01_off.gif",          
   "img/01_on.gif",  
   "img/02_off.gif",  
   "img/02_on.gif",  
   "img/03_off.gif",  
   "img/03_on.gif",  
   "img/04_off.gif",  
   "img/04_on.gif",
   "img/05_off.gif",  
   "img/05_on.gif",
   "img/06_off.gif",  
   "img/06_on.gif"
       
);
mySrcTbl = new Array( myGifCnt ); 
for (i=0; i<myGifCnt; i++){       
  mySrcTbl[i] = new Image();    
  mySrcTbl[i].src = myGifTbl[i]; 
}

function myChange( myBtnNo , myTblNo ){  
  document.images["myBtn"+myBtnNo].src = mySrcTbl[myTblNo].src;
}
// -->