drop

English [dr?p] US [drɑ:p]

vt.& vi. ??(?)

n.??;??;(? ?? ?? ??)??;

English [?p]

adv. ?? ??? ?????; ?? ??? ?? ?????

vt. & vi .????, ????, ????, ????, ????; ????, (?? ?) ??

????? ??? ??? ???

Function: ???? ???? ?? ??

????? ??? ??? ?

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
    <title>Bootstrap 實(shí)例 - 下拉菜單</title>
	<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
	<script src="https://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
	<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>向上下拉菜單</h2>
  <p>.dropup 類(lèi)用于指定一個(gè)向上的下拉菜單。</p>
  <p>.dropdown-menu 類(lèi)用于創(chuàng)建下拉菜單。</p>
  <div class="dropup">
    <button class="btn btn-default dropdown-toggle" type="button" id="menu1" data-toggle="dropdown">教程
    <span class="caret"></span></button>
    <ul class="dropdown-menu" role="menu" aria-labelledby="menu1">
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">HTML</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">CSS</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">JavaScript</a></li>
      <li role="presentation" class="divider"></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">關(guān)于我們</a></li>
    </ul>
  </div>
</div>

</body>
</html>
???? ?? ?

??? ????? ??? "???? ??" ??? ?????