tryjsref_keygen_disabled3 在线代码实例

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<!DOCTYPE html>
<html>
<body>
<form action="demo_keygen.php" method="get">
  Username: <input type="text" name="usr_name">
  Encryption: <keygen id="myKeygen" name="security">
  <input type="submit">
</form><br>
<button onclick="disableKey()">禁用 Keygen 字段</button>
<button onclick="undisableKey()">启用 Keygen 字段</button>
<script>
function disableKey()
  {
  document.getElementById("myKeygen").disabled=true;
  }
function undisableKey()
  {
  document.getElementById("myKeygen").disabled=false;
  }
</script>
</body>
</html>
 
 
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运行结果
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