function newImage(arg) {
rslt = new Image();
rslt.src = arg;
return rslt;
}

function bOver(image) {
document[image].src = eval(image +"_over.src");
}

function bOn(image) {
document[image].src = eval(image +"_on.src");
}

function bOut(image) {
document[image].src = eval(image +"_off.src");
}

b0_off = newImage('0_up.jpg');
b0_over = newImage('0_over.jpg');
b0_on = newImage('0_down.jpg');
b1_off = newImage('1_up.jpg');
b1_over = newImage('1_over.jpg');
b1_on = newImage('1_down.jpg');
b2_off = newImage('2_up.jpg');
b2_over = newImage('2_over.jpg');
b2_on = newImage('2_down.jpg');
b3_off = newImage('3_up.jpg');
b3_over = newImage('3_over.jpg');
b3_on = newImage('3_down.jpg');
b4_off = newImage('4_up.jpg');
b4_over = newImage('4_over.jpg');
b4_on = newImage('4_down.jpg');
b5_off = newImage('5_up.jpg');
b5_over = newImage('5_over.jpg');
b5_on = newImage('5_down.jpg');
b6_off = newImage('6_up.jpg');
b6_over = newImage('6_over.jpg');
b6_on = newImage('6_down.jpg');