一个简单的回到顶(*^__^*) ……

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<style>
body{
height: 5000px;
}
div{
width: 30px;
height: 120px;
border: 1px solid #b6b6b6;
position: fixed;
right: 5%;
bottom: 10%;
background: #f99;
/*display: none;*/
}

</style>
<body>
<div id="box">回到顶部</div>
</body>


<script>
        var oBox = document.getElementById("box");
        oBox.onclick = function(){
            //alert(1)
            if(document.body.scrollTop){
                
                document.body.scrollTop = 0;
                
            }else{
                
                document.documentElement.scrollTop = 0;
            }
        }
    </script>

 

posted @ 2017-06-13 16:30  骆大为  阅读(102)  评论(0)    收藏  举报