function OpenWindowArchivio() {
  var w = Math.floor((screen.width-780)/2)-6;
  var h = Math.floor((screen.height-435)/2)-15;
    winarchivio=window.open("archivio.htm","archivio","toolbar=no,scrollbars=no,directories=no,status=no,menubar=no,resizable=yes,width=780,height=435" + ",top=" + h + ",left=" + w);
    winarchivio.focus() }