When the left side of jquery floats to a certain position, the return to top button is displayed_jquery

复制代码 代码如下:

<script> <br>$(function(){ <br><br>$(window).bind('scroll',function(){ <br><br>if ($(document).scrollTop() >200) { <br>$(".asd-return").show(1); <br>}else{ <br>$(".asd-return").hide(1); <br>} <br>}) <br>$(".asd-return").click(function(){ <br>$('body,html').animate({scrollTop:0},1000); <br>}) <br>}) <br><br></script>