<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>隐藏和显示</title>
<style>
*{ padding: 0; margin: 0;}
li{ list-style-type: none;}
body{ margin: 50px;}
a{ text-decoration: none; color:#f00;}
ul{ border:3px solid #abcdef; width: 200px; display: none;}
span{cursor: pointer;}
</style>
</head>
<body>
<span>更多</span>
<ul>
<li><a href="#">列表一</a></li>
<li><a href="#">列表二</a></li>
<li><a href="#">列表三</a></li>
<li><a href="#">列表四</a></li>
<li><a href="#">列表五</a></li>
</ul>
<script src="jquery.js"></script>
<script>
$(function(){
var oBtn = $('span');
var oContent = $('ul');
oBtn.click(function(){
/*if(oContent.is(':visible')){
oContent.slideUp();
}else{
oContent.slideDown();
}*/
oContent.slideToggle();
});
});
</script>
</body>
</html>
效果图：