关于选项卡

主页面 Index.html
<nav class="mui-bar mui-bar-tab">
<a class="mui-tab-item " href='Home/Index1.html' data-top='0px' data-bottom='51px'>
<span class="mui-icon mui-icon-home-filled"></span>
<span class="mui-tab-label">Index1</span>
</a>
<a class="mui-tab-item" href='Home/Index2.html' data-top='0px' data-bottom='0px'>
<span class="mui-icon mui-icon-bars"></span>
<span class="mui-tab-label">Index2</span>
</a>
<a class="mui-tab-item" href='Home/Index3.html' data-top='0px' data-bottom='51px'>
<span class="mui-icon mui-icon-contact-filled"></span>
<span class="mui-tab-label">Index3</span>
</a>
<a class="mui-tab-item" href='Home/Index4.html' data-top='0px' data-bottom='51px'>
<span class="mui-icon mui-icon-help-filled"></span>
<span class="mui-tab-label">Index4</span>
</a>
</nav>
子页面: Home/Index1.html Home/Index2.html Home/Index3.html Home/Index4.html

主页　Index.html 无内容，只有页脚选项卡，默认显示　Home/Index1.html ,
请注意　 href='Home/Index2.html' data-top='0px' data-bottom='0px' , 每个页面打开，subpage_style 取
data-top data-bottom

现在问题来了，每次打开　Home/Index2.html , 按回退时，主页　先项卡不见了，请问大神如何破?