<div class="nav">
<div class="nav_left"></div>
<div class="nav_mid">
<div class="logo_mid_left">
<ul>
<li><a href="#">首页</a></li>
<li><a href="#">关于慕课</a></li>
<li><a href="#">新闻动态</a></li>
<li><a href="#">在线课程</a></li>
<li><a href="#">课程中心</a></li>
<li><a href="#">人才招聘</a></li>
</ul>
</div>
<div class="logo_mid_right">
<form action="" method="post">
<input type="text" >
</form>
</div>
</div>
<div class="nav_right"></div>
<div class="logo_left">
<img src="img/logo.jpg" alt="慕课网" width="190" height="70"/>
</div>
我的也是这样 搞不懂..
这样的