var NN3 = false;

image1= new Image();
image1.src = "Home_Off.gif";
image1on = new Image();
image1on.src = "Home_On.gif";

image2= new Image();
image2.src = "Courses_Off.gif";
image2on = new Image();
image2on.src = "Courses_On.gif";

image3= new Image();
image3.src = "Provider_Off.gif";
image3on = new Image();
image3on.src = "Provider_On.gif";

image4= new Image();
image4.src = "FAQ_Off.gif";
image4on = new Image();
image4on.src = "FAQ_On.gif";

image5= new Image();
image5.src = "Answer_Off.gif";
image5on = new Image();
image5on.src = "Answer_On.gif";

image6= new Image();
image6.src = "Exam_Off.gif";
image6on = new Image();
image6on.src = "Exam_On.gif";


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);
}