<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script>
window.onload=function(){
var btn = document.getElementById('btn');
var ul = document.getElementById('ul');
btn.onclick=function(){
var result=ul.style.display;
if(result=="block")
{
ul.style.display='none';
}
else
{
ul.style.display='block';
}
}
}
</script>
</head>
<body>
<p id='btn'>輸入法</p>
<ul id="ul" style="display: block">
<li>百度輸入法</li>
<li>訊飛輸入法</li>
</ul>
</body>
</html>