mo0 = new Image();
mo0.src  = "images/layout/toolbar_mo.gif";
mo1 = new Image();
mo1.src = "images/layout/mo_zenx13.gif";
mo2 = new Image();
mo2.src = "images/layout/mo_passion.gif";
mo3 = new Image();
mo3.src = "images/layout/mo_thoughts.gif";

function change(Name,Image,No) {
     document [Name].src = eval(Image + No + ".src");
     }