#formElem多个fieldset

<div id="steps">
    <form id="formElem" name="formElem" action="" method="post">
        <fieldset class="step">
            <legend>个人信息</legend>
            <p>
                <label for="username">用户名</label>
                <input id="username" name="username" />
            </p>
            <p>
                <label for="email">Email</label>
                <input id="email" name="email" placeholder="info@sucaihuo.com" type="email" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="password">密码</label>
                <input id="password" name="password" type="password" AUTOCOMPLETE=OFF />
            </p>
        </fieldset>
        <fieldset class="step">
            <legend>详细信息</legend>
            <p>
                <label for="name">全名</label>
                <input id="name" name="name" type="text" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="country">国家</label>
                <input id="country" name="country" type="text" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="phone">电话</label>
                <input id="phone" name="phone" placeholder="e.g. +351215555555" type="tel" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="website">网站</label>
                <input id="website" name="website" placeholder="e.g. https://jy.tp.yuanmeng.life/" type="tel" AUTOCOMPLETE=OFF />
            </p>
        </fieldset>
        <fieldset class="step">
            <legend>支付方式</legend>
            <p>
                <label for="cardtype">类型</label>
                <select id="cardtype" name="cardtype">
                    <option>Visa</option>
                    <option>Mastercard</option>
                    <option>American Express</option>
                </select>
            </p>
            <p>
                <label for="cardnumber">卡号</label>
                <input id="cardnumber" name="cardnumber" type="number" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="secure">安全码</label>
                <input id="secure" name="secure" type="number" AUTOCOMPLETE=OFF />
            </p>
            <p>
                <label for="namecard">姓名</label>
                <input id="namecard" name="namecard" type="text" AUTOCOMPLETE=OFF />
            </p>
        </fieldset>
    </form>
</div>

导航菜单

<div id="navigation" style="display:none;">
    <ul>
        <li class="selected">
            <a href="#">个人信息</a>
        </li>
        <li>
            <a href="#">详细信息</a>
        </li>
        <li>
            <a href="#">支付方式</a>
        </li>
    </ul>
</div>