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                        /前端開發(fā)
                        
                            /Bootstrap
                        
                        /玩轉(zhuǎn)Bootstrap（基礎(chǔ)）

下拉菜單 aria-haspopup="true" aria-expanded="true">？？

<!DOCTYPE?HTML>
<html>
<head>
????<meta?charset="utf-8">
????<meta?http-equiv="X-UA-Compatible"?content="IE=edge">
????<meta?name="viewport"?content="width=device-width,?initial-scale=1">
????<title>基本用法</title>
????<link?rel="stylesheet"?href="../bs-3.3.7/css/bootstrap.min.css">
????<script?src="../js/jquery-2.0.0.min.js"></script>
????<script?src="../bs-3.3.7/js/bootstrap.min.js"></script>
????<style?type="text/css">
????????ul>li{
????????????cursor:?pointer;
????????}
????????.dropdown{
????????????margin:?10px?0?0?10px;
????????}
????</style>
</head>
<body>

<div?class="dropdown">
????<button?class="?btn?btn-default?dropdown-toggle"??type="button"?data-toggle="dropdown"?id="dropmenu"?aria-haspopup="true"?aria-expanded="true">
????????下拉菜單
????????<span?class="caret"></span>
????</button>
????<ul?class="dropdown-menu"?aria-labelledby="dropmenu">
????????<li>蘋果</li>
????????<li>香蕉</li>
????????<li>西瓜</li>
????????<li>獼猴桃</li>
????????<li>西紅柿</li>
????</ul>
</div>
<script>
????(function?mouse()?{
????????$("li").mouseenter(function?()?{
????????????$(this).css("background-color","blue").siblings().css("background-color","#fff?");
????????});
????????$("li").mouseleave(function?()?{
????????????$("li").css("background","white");
????????})
????})();
</script>
</body>
</html>