按钮下拉菜单
@H_403_3@结合使用.btn-group(btn-group-lg/btn-group-sm/btn-group-xs) .dropup .btn .dropdown-menu 按钮下拉菜单是在普通的下拉菜单的基础上封装了.btn样式得效果，就类似于单击一个button按钮，然后显示隐藏的下拉菜单。@H_403_3@
菜单
分离式下拉菜单
向上弹起的下拉菜单@H_403_3@
<link href="bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet"> <div class="btn-group"> <ul class="dropdown-menu"> <div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown">
Success <span class="caret">
<button type="button" class="btn btn-success">Button
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown">
<span class="caret">