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

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

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

b0_out = newImage('images/image1.png');
b0_over = newImage('images/imageover1.png');
b1_out = newImage('images/image2.png');
b1_over = newImage('images/imageover2.png');
b2_out = newImage('images/image4.png');
b2_over = newImage('images/imageover4.png');
b3_out = newImage('images/image5.png');
b3_over = newImage('images/imageover5.png');
b4_out = newImage('images/image6.png');
b4_over = newImage('images/imageover6.png');
b5_out = newImage('images/image7.png');
b5_over = newImage('images/imageover7.png');
b6_out = newImage('images/image8.png');
b6_over = newImage('images/imageover8.png');
b7_out = newImage('images/image9.png');
b7_over = newImage('images/imageover9.png');
b8_out = newImage('images/image11.png');
b8_over = newImage('images/imageover11.png');
b9_out = newImage('images/image12.png');
b9_over = newImage('images/imageover12.png');
b10_out = newImage('images/image13.png');
b10_over = newImage('images/imageover13.png');
b11_out = newImage('images/image14.png');
b11_over = newImage('images/imageover14.png');
b12_out = newImage('images/image15.png');
b12_over = newImage('images/imageover15.png');