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('Menu_bar/button0.gif');
b0_over = newImage('Menu_bar/buttonover0.gif');
b1_out = newImage('Menu_bar/button1.gif');
b1_over = newImage('Menu_bar/buttonover1.gif');
b2_out = newImage('Menu_bar/button2.gif');
b2_over = newImage('Menu_bar/buttonover2.gif');
b3_out = newImage('Menu_bar/button3.gif');
b3_over = newImage('Menu_bar/buttonover3.gif');
b4_out = newImage('Menu_bar/button4.gif');
b4_over = newImage('Menu_bar/buttonover4.gif');