1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>无标题文档</title> 6 </head> 7 8 <body> 9 <style> 10 #goTopBtn {position: fixed;line-height:36px;width:36px;bottom:35px;height:36px;cursor:pointer;display:none; 11 background:#0000CC;} 12 13 #goTopBt{height:4000px} 14 </style> 15 <br/> 16 <p style="text-align:center;font-family:Georgia, 'Times New Roman', Times, serif;font-size:24px;font-weight:bold;">***，how are you。 17 <br/>Just do what you want do!!!</p> 18 <div id="goTopBt"></div> 19 <div id="goTopBtn"></div> 20 <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.min.js"></script> 21 <script type="text/javascript"> 22 $(window).scroll(function(){ 23 var sc=$(window).scrollTop(); 24 if(sc>0){ 25 $("#goTopBtn").css("display","block"); 26 $("#goTopBtn").css("right","36px") 27 }else{ 28 $("#goTopBtn").css("display","none"); 29 } 30 }) 31 32 $("#goTopBtn").click(function(){ 33 34 $('body,html').animate({scrollTop:0},500); 35 }) 36 37 </script> 38 </body> 39 </html>