第一张图变到第二张图，窗口变小时，会自动换行怎么办，怎么能不换行，让它隐藏或者什么。
这是代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
*{padding:0:border:0;margin:0;list-style:none;text-decoration:none;font-size:12px;font-weight:900;}
body{background:#0F6}
#head {weight:150px;height:80px;padding:5px;}
.logo{float:left;margin-left:10px;}
.nav li{float:left;position:relative;}
.nav a{line-height:80px;padding:0 55px;color:#FFF;display:inline-block;font-weight:900;transition:all 1s;}
.nav a:hover{color:#F00;}
.nav2 {width:140px;position:absolute;top:55px;left:0;display:none;}
.nav2 a{line-height:30px;}
.bg{width:100%;height:90px;background:#000;opacity:0.8;z-index:-1;position:absolute;top:0;left:0;}
</style>
<script type="text/javascript" src="js/jquery-2.2.3.js"></script>
<script type="text/javascript">
$(function(){
$(".nav li").hover(function(){
$(".bg").stop().animate({height:70+$(this).children(".nav2").height()},"fast");
$(this).children(".nav2").stop(false,true).slideDown();
},
function(){
$(".bg").stop().animate({height:90},"fast")
$(this).children(".nav2").stop(false,true).slideUp("fast")
})
})
</script>
</head>
<body>
<div id="head">
<div class="logo"><a href="http://www.baidu.com"><img src="photo/logo_white_fe6da1ec.png" width="130px" height="65px"/></a></div>
<div class="nav" >
<ul>
<li ><a href="#">123</a>
<div class="nav2"><a href="#">23</a>
<a href="#">324</a>
<a href="#">4324</a>
<a href="#">4324</a>
<a href="#">4324</a>
</div>
</li>
<li ><a href="#">134</a>
<div class="nav2"><a href="#">324</a>
<a href="#">4324</a>
<a href="#">4234</a></div></li>
<li ><a href="#">1566</a>
<div class="nav2"><a href="#">324</a>
<a href="#">4324</a>
<a href="#">4234</a></div></li>
<li ><a href="#">16545</a>
<div class="nav2"><a href="#">324</a>
<a href="#">4324</a>
</div></li>
<li ><a href="#">1535</a>
<div class="nav2"><a href="#">324</a>
<a href="#">4324</a>
<a href="#">4234</a></div></li>
</ul>
</div>
<div class="bg"></div>
</div>
</body>
</html>
