W3School TIY Editor
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<!DOCTYPE html> <html> <body> <p>点击单选按钮可切换密码的可见性：</p> 密码：<input type="password" value="FakePSW" id="myInput"><br><br> <input type="checkbox" onclick="myFunction()">显示密码 <script> function myFunction() { var x = document.getElementById("myInput"); if (x.type === "password") { x.type = "text"; } else { x.type = "password"; } } </script> </body> </html>