isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"
isamap[2] = "_ot"
isamap[3] = "_dn"

function isimgact(id, act)
{
  if(document.images) document.images[id].src = eval( "isimages." + id + isamap[act] + ".src");
}

if (document.images) { 
isimages = new Object();
isimages.i11_df = new Image();
isimages.i11_df.src = "images/iuvod.gif";

isimages.i11_ov = new Image();
isimages.i11_ov.src = "images/iuvod_ov.gif";

isimages.i13_df = new Image();
isimages.i13_df.src = "images/ireference.gif";

isimages.i13_ov = new Image();
isimages.i13_ov.src = "images/ireference_ov.gif";

isimages.i14_df = new Image();
isimages.i14_df.src = "images/ikontakt.gif";

isimages.i14_ov = new Image();
isimages.i14_ov.src = "images/ikontakt_ov.gif";

isimages.i15_df = new Image();
isimages.i15_df.src = "images/inapiste.gif";

isimages.i15_ov = new Image();
isimages.i15_ov.src = "images/inapiste_ov.gif";

isimages.i20_df = new Image();
isimages.i20_df.src = "images/imapa.gif";

isimages.i20_ov = new Image();
isimages.i20_ov.src = "images/imapa_ov.gif";

}