div展示隐藏

div显示隐藏
用jquery 实现起来超级简单

<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(function() {
  $(".btn1").click(function(){
$("div").toggle();
  });
});
</script>
</head>
<body>
<div>我是div.</div>
<button class="btn1">Toggle</button>
</body>
</html>