function meta() {
  var n = (document.layers) ? 1:0;
  var ie = (document.all) ? 1:0;

  if (n) document.write('<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">');
  if (ie) document.write('<meta http-equiv="Content-Type" content="text/html; charset=big5">');
}