_1_on = new Image; _1_on.src = "img/pd_09.jpg";
_1_off = new Image; _1_off.src = "img/p_09.jpg";
function onebut_on(imgName) { document [imgName].src = _1_on.src; }
function onebut_off(imgName) { document [imgName].src = _1_off.src; }