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");
}

b1_out = newImage('http://youremblem.com/images/topmenu_01.png');b1_over = newImage('http://youremblem.com/images/topmenuover_01.png');
b2_out = newImage('http://youremblem.com/images/topmenu_02.png');b2_over = newImage('http://youremblem.com/images/topmenuover_02.png');
b3_out = newImage('http://youremblem.com/images/topmenu_03.png');b3_over = newImage('http://youremblem.com/images/topmenuover_03.png');
b4_out = newImage('http://youremblem.com/images/topmenu_04.png');b4_over = newImage('http://youremblem.com/images/topmenuover_04.png');
b5_out = newImage('http://youremblem.com/images/topmenu_05.png');b5_over = newImage('http://youremblem.com/images/topmenuover_05.png');
b6_out = newImage('http://youremblem.com/images/topmenu_06.png');b6_over = newImage('http://youremblem.com/images/topmenuover_06.png');