Bootstrap Navbar Dropdown Mobile Issue

当我的网页设计折叠到移动视图时，下拉菜单不会按下下面的按钮，而是显示在页面的一半。这种情况似乎只发生在具有旋转木马功能和lightbox2的页面上。

如有任何帮助，我们将不胜感激。

我已经尝试过这个，这是在另一个主题中建议的：

.navbar-header {
position: relative;

z索引：1；}

这是导航栏代码：

    <nav>
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#defaultNavbar1" aria-expanded="false"><span class="glyphicon glyphicon-menu-hamburger"></span></button>
    </div>
    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="defaultNavbar1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="index.html">Home<span class="sr-only">(current)</span></a></li>
        <li><a href="about.html">About Me</a></li>
        <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Photography<span class="caret"></span></a>
          <ul class="dropdown-menu">
          <li><a href="events.html">Events</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="music.html">Music</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="nature.html">Nature</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="people.html">People</a></li>
          </ul>
        </li>
        <li><a href="construction.html">Contact Me</a></li>
      </ul>
    </div>
    <!-- /.navbar-collapse -->
  </div>
  <!-- /.container-fluid -->
</nav>

以及底部的脚本`

<script src="js/jquery-1.11.3.min.js" type="text/javascript"></script>
<script src="js/bootstrap-3.3.5.js" type="text/javascript"></script>
<script src="js/lightbox.js" type="application/javascript"></script>
<script>
    lightbox.option({
      'resizeDuration': 600,
      'wrapAround': true,
      'alwaysShowNavOnTouchDevices': true,
      'fitImagesInViewport': true
    })
</script>`