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/button0.png');b0_over=newImage('images/buttonover0.png');