if (document.images){

aroff = new Image (159, 20);
aroff.src = "/images/b_arti.gif";
aron = new Image (159, 20);
aron.src = "/images/b_arti_on.gif";

bloff = new Image (159, 20);
bloff.src = "/images/b_blog.gif";
blon = new Image (159, 20);
blon.src = "/images/b_blog_on.gif";

cuoff = new Image (159, 20);
cuoff.src = "/images/b_cont.gif";
cuon = new Image (159, 20);
cuon.src = "/images/b_cont_on.gif";

dooff = new Image (159, 20);
dooff.src = "/images/b_down.gif";
doon = new Image (159, 20);
doon.src = "/images/b_down_on.gif";

lioff = new Image (159, 20);
lioff.src = "/images/b_link.gif";
lion = new Image (159, 20);
lion.src = "/images/b_link_on.gif";

maoff = new Image (159, 20);
maoff.src = "/images/b_main.gif";
maon = new Image (159, 20);
maon.src = "/images/b_main_on.gif";

mgoff = new Image (159, 20);
mgoff.src = "/images/b_msgs.gif";
mgon = new Image (159, 20);
mgon.src = "/images/b_msgs_on.gif";

muoff = new Image (159, 20);
muoff.src = "/images/b_musi.gif";
muon = new Image (159, 20);
muon.src = "/images/b_musi_on.gif";

npoff = new Image (159, 20);
npoff.src = "/images/b_nowp.gif";
npon = new Image (159, 20);
npon.src = "/images/b_nowp_on.gif";

pcoff = new Image (159, 20);
pcoff.src = "/images/b_cart.gif";
pcon = new Image (159, 20);
pcon.src = "/images/b_cart_on.gif";

proff = new Image (159, 20);
proff.src = "/images/b_proj.gif";
pron = new Image (159, 20);
pron.src = "/images/b_proj_on.gif";

tmoff = new Image (159, 20);
tmoff.src = "/images/b_them.gif";
tmon = new Image (159, 20);
tmon.src = "/images/b_them_on.gif";

weoff = new Image (159, 20);
weoff.src = "/images/b_webs.gif";
weon = new Image (159, 20);
weon.src = "/images/b_webs_on.gif";

whoff = new Image (159, 20);
whoff.src = "/images/b_who.gif";
whon = new Image (159, 20);
whon.src = "/images/b_who_on.gif";

}

function img_act(imgName)
{
   if (document.images){
      imgOn = eval(imgName + "on.src");
      document [imgName].src = imgOn;
   }
}


function img_inact(imgName)
{
   if (document.images){
      imgOff = eval(imgName + "off.src");
      document [imgName].src = imgOff;
   }
}