<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").bind({
click:function(){$("p").slideToggle();},
mouseover:function(){$("body").css("background-color","#E9E9E4");},
mouseout:function(){$("body").css("background-color","#FFFFFF");}
});
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<button>Click me!</button>
</body>
</html>