所属分类:网页特效-在线客服
<link href="css/lrtk.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
$(function() {
$(".btn_top").hide();
$(".btn_top").live("click",function(){
$('html, body').animate({scrollTop: 0},300);return false;
})
$(window).bind('scroll resize',function(){
if($(window).scrollTop()<=300){
$(".btn_top").hide();
}else{
$(".btn_top").show();
}
})
})
<div class="izl-rmenu">
<a class="consult" target="_blank"><div class="phone" style="display:none;">010-8888888</div></a>
<a class="cart"><div class="pic"></div></a>
<a href="javascript:void(0)" class="btn_top" style="display: block;"></a>
</div>
<a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=1030040075&site=qq&menu=yes" id="udesk-feedback-tab" class="udesk-feedback-tab-left" style="display: block; background-color: black;"></a>