Front label

<form id="userForm">
        <p>姓名：<input type="text" name="userNamee" value="李白"></p>
        <p>性别：<input type="radio" name="sex" value="male" checked>男
            <input type="radio" name="sex" value="female">女
        </p>
        <p>城市：<select name="city">
                <option value="1">北京</option>
                <option value="2">上海</option>
                <option value="3">广州</option>
                <option value="4">深圳</option>
            </select></p>
        <p>
            头像:<input type="file" name="headImg"></p>
        </p>
        <p><input type="button" id="btn" value="添加"></p>
    </form>