gotop(返回顶部)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
</head>
<body>
<style>
    #goTopBtn {
        position: fixed;
        line-height:36px;
        width:36px;
        bottom:35px;
        right:235px;
        height:36px;
        cursor:pointer;
        display:block;
        color:red;
        font-size:40px;
        }
</style>
<br/>
<p style="text-align:center;font-family:Georgia, 'Times New Roman', Times, serif;font-size:24px;font-weight:bold;"></p>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<div id="goTopBtn">1321687461321</div>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.js"></script>
<!--<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>-->

<script type="text/javascript">
        //返回顶部
        $(document).ready(function(){
            $(window).scroll(function(){
                var sc=$(window).scrollTop();
                var rwidth=$(window).width()
                if(sc>0){
                    $("#goTopBtn").css("display","block");
        //            $("#goTopBtn").css("left",(rwidth-36)+"px")
                }else{
                    $("#goTopBtn").css("display","none");
                }
            })
            $("#goTopBtn").click(function(){
                var sc=$(window).scrollTop();
                $('body,html').animate({scrollTop:0},500);
            })
        })
</script>
</body>
</html>

 

posted @ 2017-04-22 14:25  -CLAY-  阅读(324)  评论(0编辑  收藏  举报