$query(“textarea.rich”)
  .addHandler(“focus”, function(e) {
    Sys.Debug.trace(“focused into “ + (e.eventTarget.id || “?”));
  })
  .setStyle(“width”, function() {
    return (document.body.clientWidth – 10) + “px”;
  })
  .create(Contoso.UI.RichTextBehavior, {
    showToolbar: true,
    fonts: [“Arial”, “Times”, “Courier”]
  });

这代码写的跟jquery似的……
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