var n3 = false;
image1       = new Image();
image1.src   = "nav/homea.gif";
image1on     = new Image();
image1on.src = "nav/homeo.gif"

image2       = new Image();
image2.src   = "nav/aboutA.gif";
image2on     = new Image();
image2on.src = "nav/aboutO.gif"

image3       = new Image();
image3.src   = "nav/volunteeringA.gif";
image3on     = new Image();
image3on.src = "nav/volunteeringO.gif"

image4       = new Image();
image4.src   = "nav/attractionsA.gif";
image4on     = new Image();
image4on.src = "nav/attractionsO.gif"

image5       = new Image();
image5.src   = "nav/safarisA.gif";
image5on     = new Image();
image5on.src = "nav/safarisO.gif"

image6       = new Image();
image6.src   = "nav/trekkingA.gif";
image6on     = new Image();
image6on.src = "nav/trekkingO.gif"

image7       = new Image();
image7.src   = "nav/traveltipsA.gif";
image7on     = new Image();
image7on.src = "nav/traveltipsO.gif"

image8       = new Image();
image8.src   = "nav/linksA.gif";
image8on     = new Image();
image8on.src = "nav/linksO.gif"

image9       = new Image();
image9.src   = "nav/photosA.gif";
image9on     = new Image();
image9on.src = "nav/photosO.gif"

image10       = new Image();
image10.src   = "nav/contactA.gif";
image10on     = new Image();
image10on.src = "nav/contactO.gif"

function on3(name)
{
    document[name].src = eval(name + "on.src");
}

function off3(name)
{
    document[name].src = eval(name + ".src");
}

n3 = true;
function on(name)
{
   if (n3)
      on3(name);
}

function off(name)
{
   if (n3)
      off3(name);
}