img = new Array("images/bbo1.gif","images/bbob1.gif","images/bbo2.gif","images/bbob2.gif","images/bbo3.gif","images/bbob3.gif","images/bo1.gif","images/bob1.gif","images/bo2.gif","images/bob2.gif","images/bo3.gif","images/bob3.gif","images/bo4.gif","images/bob4.gif","images/bo5.gif","images/bob5.gif","images/bo6.gif","images/bob6.gif","images/san1.gif","images/san2.gif","images/bo01.gif","images/bo01b.gif","images/bo02.gif","images/bo02b.gif","images/bo03.gif","images/bo03b.gif");
bfImg = new Array();
for(i=0; i<img.length; i++) {
  bfImg[i] = new Image();
  bfImg[i].src = img[i];
}