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源代码：
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<!DOCTYPE html> <html> <body> <form action="demo_keygen.asp" method="get"> Username: <input type="text" name="usr_name"> Encryption: <keygen id="myKeygen" name="security"> <input type="submit"> </form> <p>点击 "点我" 按钮返回表单元素中 keygen 字段的类型。</p> <p id="demo"></p> <button onclick="myFunction()">点我</button> <script> function myFunction() { var x = document.getElementById("myKeygen").type; document.getElementById("demo").innerHTML=x; } </script> </body> </html>
运行结果
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