var text = "Ihr Browser unterstützt <code>document.compatMode</code> nicht.";
if (document.compatMode) {
  var mode = document.compatMode
  text = "<dl><dt>Wert von <code>document.compatMode</code>:</dt><dd><code>" + mode + "</code></dd><dt>Darstellungsmodus:</dt><dd>";
  if (mode.indexOf("CSS1Compat") != -1) {
    text = text + "Standards Mode";
  }
  else {
    text = text + "Quirks Mode";
  }
  text = text + "</dd></dl>";
}