function isimgact(id, act)
{if(document.images) document.images[id].src =
eval( "isimages." + id + isamap[act] + ".src");}
if (document.images) {
 isimages = new Object();
 isimages.U1_df = new Image();
 isimages.U1_df.src = "img/fotik/fotikn.jpg";
 isimages.U1_ov = new Image();
 isimages.U1_ov.src = "img/fotik/fotiko.jpg";
 isimages.U11_df = new Image();
 isimages.U11_df.src = "img/fotik/videon.jpg";
 isimages.U11_ov = new Image();
 isimages.U11_ov.src = "img/fotik/videoo.jpg";
}