案例:html案例     状态:可编辑再运行    进入竖版
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<!DOCTYPE html>
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<html>
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<body>
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<form action="">
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User name:<br>
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<input type="text" name="userid">
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<br>
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User password:<br>
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<input type="password" name="psw">
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</form>
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<p>The characters in a password field are masked (shown as asterisks or circles).</p>
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</body>
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</html>
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