jquery网页右侧悬浮的返回顶部和在线客服代码，鼠标滑过二维码显示隐藏，js css 分离，js css 注释清晰，下载即可使用，
使用方法：
1、head引入css文件
<link href="css/style.css" rel="stylesheet" type="text/css" />
2、head引入js文件
<script type="text/javascript" src="js/jquery.js"></script>
3、body引入HTML代码
<div class="suspension">
<a class="consult" target="_blank" title="在线客服">
<div class="suspension-list" style="display:none;">
<div class="suspension-list-content">
<ul>
<li>
<div href="javascript:;" class="service-phone">
<span class="info-name">客服热线</span>
<span class="info-value">400-888-xxxx</span>
</div>
</li>
<li>
<div href="javascript:;" class="service-qq">
<span class="info-name">在线客服</span>
<span class="info-value">80099xxxx</span>
</div>
</li>
<li class="suspension-list-bottom">
<div href="javascript:;" class="service-proposal">
<span class="info-name">投诉与建议</span>
<span class="info-value">最快10分钟内回应</span>
</div>
</li>
</ul>
</div>
</div>
</a>
<a class="cart" title="关注微信公众账号">
<div class="pic">
<div class="pic-content"></div>
</div>
</a>
<a href="javascript:void(0)" class="back-top" style="display: block;" title="返回顶部"></a>
</div>
<script type="text/javascript">
$(function() {
$(".back-top").hide();
$(".back-top").live("click", function() {
$('html, body').animate({
scrollTop: 0
}, 400);
return false;
})
$(window).bind('scroll resize', function() {
if ($(window).scrollTop() <= 400) {
$(".back-top").hide();
} else {
$(".back-top").show();
}
})
})
</script>
