var n3 = false;
image1       = new Image();image1.src   = 'img/men_1_1.png';
image1on     = new Image();image1on.src = 'img/men_1_1a.png';
image2       = new Image();image2.src   = 'img/men_2_1.png';
image2on     = new Image();image2on.src = 'img/men_2_1a.png';
image3       = new Image();image3.src   = 'img/men_3_1.png';
image3on     = new Image();image3on.src = 'img/men_3_1a.png';
image4       = new Image();image4.src   = 'img/men_4_1.png';
image4on     = new Image();image4on.src = 'img/men_4_1a.png';
image5       = new Image();image5.src   = 'img/men_5_1.png';
image5on     = new Image();image5on.src = 'img/men_5_1a.png';

function on3(name) { document[name].src = eval(name + 'on.src'); }
function off3(name) { document[name].src = eval(name + '.src'); }
n3 = true;
function on(name) { if (n3) on3(name); }
function off(name) { if (n3) off3(name); }