<html><head><script src="https://libs.baidu.com/jquery/2.1.4/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>