iframe_bug976673.html

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<!DOCTYPE html>

<html>

<head>

  <meta charset="utf-8">

  <title>Test for Bug 976673</title>

</head>

<body>

  <input id="input" onfocus="event.target.value = event.type;"

                    onblur="event.target.value = event.type;">

  <script>

    var input = document.getElementById("input");

    window.addEventListener("message", function (aEvent) {

        switch (aEvent.data) {

          case "init":

            input.blur();

            input.value = "";

            input.focus();

          // fall through

          case "check":

            aEvent.source.postMessage("input-value: " + input.value, "*");

            break;

});

  </script>

</body>

</html>