img51on = new Image(); img51on.src = "../images/on/external.gif"; img51off = new Image(); img51off.src = "../images/off/external.gif";
img52on = new Image(); img52on.src = "../images/on/internal.gif"; img52off = new Image(); img52off.src = "../images/off/internal.gif";
img50on = new Image(); img50on.src = "../images/on/summary.gif"; img50off = new Image(); img50off.src = "../images/off/summary.gif";

img51Aon = new Image(); img51Aon.src = "../images/nav/onn.gif"; img51Aoff = new Image(); img51Aoff.src = "../images/nav/off.gif";
img52Aon = new Image(); img52Aon.src = "../images/nav/onn.gif"; img52Aoff = new Image(); img52Aoff.src = "../images/nav/off.gif";
img50Aon = new Image(); img50Aon.src = "../images/nav/onn.gif"; img50Aoff = new Image(); img50Aoff.src = "../images/nav/off.gif";