var NN3 = false;

image1= new Image();
image1.src = "images/nav-home-a.gif";
image1on = new Image();
image1on.src = "images/nav-home-b.gif";

image2= new Image();
image2.src = "images/nav-repair-a.gif";
image2on = new Image();
image2on.src = "images/nav-repair-b.gif";

image3= new Image();
image3.src = "images/nav-worksamples-a.gif";
image3on = new Image();
image3on.src = "images/nav-worksamples-b.gif";

image4= new Image();
image4.src = "images/nav-clients-a.gif";
image4on = new Image();
image4on.src = "images/nav-clients-b.gif";

image5= new Image();
image5.src = "images/nav-contact-a.gif";
image5on = new Image();
image5on.src = "images/nav-contact-b.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);

}