b1 = new Image();
b1.src = "images/b1.gif";
(new Image()).src = "images/b1-0.gif";

b2 = new Image();
b2.src = "images/b2.gif";
(new Image()).src = "images/b2-0.gif";

b3 = new Image();
b3.src = "images/b3.gif";
(new Image()).src = "images/b3-0.gif";

b4 = new Image();
b4.src = "images/b4.gif";
(new Image()).src = "images/b4-0.gif";

b5 = new Image();
b5.src = "images/b5.gif";
(new Image()).src = "images/b5-0.gif";

b6 = new Image();
b6.src = "images/b6.gif";
(new Image()).src = "images/b6-0.gif";

b7 = new Image();
b7.src = "images/b7.gif";
(new Image()).src = "images/b7-0.gif";

b8 = new Image();
b8.src = "images/b8.gif";
(new Image()).src = "images/b8-0.gif";