var img_foto=new Image();

function mostra_foto(foto) {

if (document.all||document.getElementById){

      if (document.getElementById) {

			if (document.images) {

								 document['foto'].src=img_carga.src;

								 img_foto.src='../misc/fotos/'+foto+'.jpg';

								 document['foto'].src=img_foto.src;

								 }

			}

         else {

						if (document.images) {

								 document['foto'].src=img_carga.src;

								 img_foto.src='../misc/fotos/'+foto+'.jpg';

								 document['foto'].src=img_foto.src;

					   }	

			}

   } 

}
function makevisible(cur,which){
strength=(which==0)? 1 : 0.5
if (cur.style.MozOpacity)
cur.style.MozOpacity=strength
else if (cur.filters)
cur.filters.alpha.opacity=strength*100
}

function makevisible2(cur,which){
strength=(which==0)? 0.5 : 1
if (cur.style.MozOpacity)
cur.style.MozOpacity=strength
else if (cur.filters)
cur.filters.alpha.opacity=strength*100
}