function new_window(foto,width,height) {
  hres = width + 40;
  vres = height + 25;
  history_replace = 0;
  options = 'toolbar=0'+
            ',location=0'+
            ',directories=0'+
            ',status=0'+
            ',menubar=0'+
            ',scrollbars=1'+
            ',resizable=1'+
            ',width='+hres+
            ',height='+vres
  NewWin = window.open(foto,"_blank",options,history_replace);
 }