每当我点击栏图标时,菜单会在导航栏中弹出,而不是在导航栏下方。我该如何纠正?
<!DOCTYPE HTML>
<HTML lang="en">
<HEAD>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css/bootstrap-theme.css">
<link rel="stylesheet" type="text/css" href="css/styles.css">
</style>
<HEAD>
<BODY>
<div class="navbar navbar-inverse navbar-static-top">
<div class="container">
<a href="#" class="navbar-brand">Portfolio</a>
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navHeadercollapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<div class="collapse navbar-collapse navHeadercollapse">
<ul class="nav navbar-nav navbar-right">
<li class="active"><a href="#">home</a></li>
<li><a href="#">social</a></li>
<li><a href="#">contact us</a></li>
<li><a href="#">about us</a></li>
</ul>
</div>
</div>
</div>
<script src = "jquery/jquery-2.1.3.min.js"></script>
<script src="js/bootstrap.js"></script>
</BODY>
</HTML>
![enter image description here][1]