var oldActive = null;
function setBtnActive(btn){
	if (oldActive != null){
		document.getElementById(oldActive).className = "";
	}
	oldActive = btn;
	document.getElementById(btn).className = "activeLink";
}

function Foto(img){
  foto1= new Image();
  foto1.src=(img);
  Controlla(img);
}
function Controlla(img){
  if((foto1.width!=0)&&(foto1.height!=0)){
    viewFoto(img);
  }
  else{
    funzione="Controlla('"+img+"')";
    intervallo=setTimeout(funzione,20);
  }
}
function viewFoto(img){
  largh=foto1.width+20;
  altez=foto1.height+20;
  stringa="width="+largh+",height="+altez;
  finestra=window.open(img,"",stringa);
}