Bootstrap导航栏,响应式导航栏

<nav class="navbar navbar-default navbar-fixed-top navbar-inverse" role="navigation">

  <div class="container">

    <div class="navbar-header">

      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">

        <span class="sr-only">Toggle navigation</span>

        <span class="icon-bar"></span>

        <span class="icon-bar"></span>

        <span class="icon-bar"></span>

      </button>

      <a class="navbar-brand" href="#">现代浏览器博物馆</a>

    </div>

    <div class="collapse navbar-collapse" >

      <ul class="nav navbar-nav">

        <li class="active">

          <a href="#">综述</a>

        </li>

        <li>

          <a href="#">简述</a>

        </li>

        <li class="dropdown">

          <a href="#" class="dropdown-toggle" data-toggle="dropdown">

            特点

            <span class="caret"></span>

          </a>

          <ul class="dropdown-menu" role="menu">

            <li><a href="#">Chrom</a></li>

            <li><a href="#">Firefox</a></li>

            <li><a href="#">Opera</a></li>

            <li><a href="#">Safari</a></li>

            <li><a href="#">IE</a></li>

          </ul>

        </li>

        <li>

          <a href="#">关于</a>

        </li>

      </ul>

    </div>

  </div>

</nav>