案例:html5案例     状态:可编辑再运行    进入竖版
 运行结果 
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<!DOCTYPE HTML>
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<html>
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<body>
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<form action="/example/html/form_action.aspx" method="get" id="user_form">
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E-mail: <input type="email" name="fname" /><br />
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<input type="submit" value="Submit" /><br />
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<input type="submit" formaction="/example/demo_admin.aspx" value="Submit as admin" /><br />
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<input type="submit" formnovalidate="true" value="Submit without validation" /><br />
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</form>
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</body>
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</html>