mb1_off = new Image(58, 33);
mb1_off.src = "images/mb1_off.jpg";
mb1_on = new Image(58, 33);
mb1_on.src = "images/mb1_on.jpg";

mb2_off = new Image(83, 33);
mb2_off.src = "images/mb2_off.jpg";
mb2_on = new Image(83, 33);
mb2_on.src = "images/mb2_on.jpg";

mb3_off = new Image(75, 33);
mb3_off.src = "images/mb3_off.jpg";
mb3_on = new Image(75, 33);
mb3_on.src = "images/mb3_on.jpg";

mb4_off = new Image(78, 33);
mb4_off.src = "images/mb4_off.jpg";
mb4_on = new Image(78, 33);
mb4_on.src = "images/mb4_on.jpg";

mb5_off = new Image(89, 33);
mb5_off.src = "images/mb5_off.jpg";
mb5_on = new Image(89, 33);
mb5_on.src = "images/mb5_on.jpg";

mb6_off = new Image(140, 33);
mb6_off.src = "images/mb6_off.jpg";
mb6_on = new Image(140, 33);
mb6_on.src = "images/mb6_on.jpg";

mb7_off = new Image(103, 33);
mb7_off.src = "images/mb7_off.jpg";
mb7_on = new Image(103, 33);
mb7_on.src = "images/mb7_on.jpg";

mb8_off = new Image(116, 33);
mb8_off.src = "images/mb8_off.jpg";
mb8_on = new Image(116, 33);
mb8_on.src = "images/mb8_on.jpg";

mba1_off = new Image(80, 33);
mba1_off.src = "images/mba1_off.jpg";
mba1_on = new Image(80, 33);
mba1_on.src = "images/mba1_on.jpg";

mba2_off = new Image(246, 33);
mba2_off.src = "images/mba2_off.jpg";
mba2_on = new Image(246, 33);
mba2_on.src = "images/mba2_on.jpg";

mba3_off = new Image(104, 33);
mba3_off.src = "images/mba3_off.jpg";
mba3_on = new Image(104, 33);
mba3_on.src = "images/mba3_on.jpg";

mba4_off = new Image(95, 33);
mba4_off.src = "images/mba4_off.jpg";
mba4_on = new Image(95, 33);
mba4_on.src = "images/mba4_on.jpg";

mbm1_off = new Image(79, 33);
mbm1_off.src = "images/mbm1_off.jpg";
mbm1_on = new Image(79, 33);
mbm1_on.src = "images/mbm1_on.jpg";

mbm2_off = new Image(76, 33);
mbm2_off.src = "images/mbm2_off.jpg";
mbm2_on = new Image(76, 33);
mbm2_on.src = "images/mbm2_on.jpg";

mbm3_off = new Image(69, 33);
mbm3_off.src = "images/mbm3_off.jpg";
mbm3_on = new Image(69, 33);
mbm3_on.src = "images/mbm3_on.jpg";

function imgAct(name) {
  imgOn = eval(name + "_on.src");
  imgName = name;
  document [imgName].src = imgOn;
}

function imgInact(name) {
  imgOn = eval(name + "_off.src");
  imgName = name;
  document [imgName].src = imgOn;
}