var NN3 = false;image1= new Image();
image1.src = "saturn.gif";image1on = new Image();
image1on.src = "saturnbright.gif";image2= new Image();
image2.src = "neptune.gif";image2on = new Image();
image2on.src = "neptunebright.gif";image3= new Image();
image3.src = "mars.gif";image3on = new Image();
image3on.src = "marsbright.gif";image4= new Image();
image4.src = "uranus.gif";image4on = new Image();
image4on.src = "uranusbright.gif";image5= new Image();
image5.src = "earthy.jpg";image5on = new Image();
image5on.src = "earthybright.jpg";function on3(name)   {
        document[name].src = eval(name + "on.src");}function off3(name)  {
        document[name].src = eval(name + ".src");}NN3 = true;
function on(name)  {        if (NN3) on3(name);}function off(name)  {
        if (NN3) off3(name);}