jQuery返回顶部的按钮
HTML结构:
<script type="text/javascript" src="../js/jquery-1.8.3/jquery.js"></script>
body里的代码:
<div class="hulubo"> <a href="javascript:"></a> </div>
css结构:
.hulubo{left:1180px; bottom:69.8px; right:auto; position:fixed; z-index: 199999;} .hulubo a{position:absolute; height:58px;width:58px; background:url(../images/gotop.png)no-repeat scroll;background-position:center;background-size: 58px 58px;}
直接改宽高和背景图片就可以了
jQuery代码:
1 $(function(){ 2 var $btn_top = $('.hulubo'); 3 12 $("body").append($btn_top); 13 $("body").on("click",".hulubo",function(){ 14 $("html,body").animate({scrollTop: 0},"slow"); 15 }); 16 var $btn = $(".hulubo"); 17 if($(window).scrollTop() > 100){ 18 $btn.fadeIn(600); 19 } 20 $(window).scroll(function(){ 21 if($(window).scrollTop() > 100){ 22 $btn.fadeIn(600); 23 }else{ 24 $btn.fadeOut(600); 25 } 26 }); 27 });