编程学习网为您整理以下代码实例，主要实现：Bootstrap Dropup变化，希望可以帮到各位朋友。
<!DOCTYPE HTML>
<HTML>
<head>
<Title>Try v1.2 bootstrap Online</Title>
<link href="/bootstrap/CSS/bootstrap.min.CSS" rel="stylesheet">
<script src="/scripts/jquery.min.Js"></script>
<script src="/bootstrap/Js/bootstrap.min.Js"></script>
</head>
<body>
<div class = "row" style = "margin-left:50px; margin-top:200px">
<div class = "btn-group dropup">
<button type = "button" class = "btn btn-default dropdown-toggle" data-toggle = "dropdown">
Default
<span class = "caret"></span>
</button>
<ul class = "dropdown-menu" role = "menu">
<li><a href = "#">Action</a></li>
<li><a href = "#">Another action</a></li>
<li><a href = "#">Something else here</a></li>
<li class = "divIDer"></li>
<li><a href = "#">Separated link</a></li>
</ul>
</div>
<div class = "btn-group dropup">
<button type = "button" class = "btn btn-primary dropdown-toggle" data-toggle = "dropdown">
Primary
<span class = "caret"></span>
</button>
<ul class = "dropdown-menu" role = "menu">
<li><a href = "#">Action</a></li>
<li><a href = "#">Another action</a></li>
<li><a href = "#">Something else here</a></li>
<li class = "divIDer"></li>
<li><a href = "#">Separated link</a></li>
</ul>
</div>
</div>
</body>
</HTML>
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