<div class="fixed-tool fixed right-24 bottom-140">
	<a href="" class="tool-item block">
		<i class="iconfont icon-lianxikefu text-18 "></i>
		<span class="text-12 block">客服</span>
	</a>
	<a href="" class="tool-item block">
		<i class="iconfont icon-weixin text-18 "></i>
		<span class="text-12 block">微信</span>
		<div class="popper-wechat">
			<img src="img/QR_code.5878291d.png" class="w-100 h-100">
		</div>
	</a>
	<a href="javascript:;" id="backTop" class="tool-item block active">
		<i class="iconfont icon-zhiding2 text-18 "></i>
		<span class="text-12 block">置顶</span>
	</a>
</div>

$("#backTop").click(function() {
			$('body,html').animate({
			  scrollTop: 0
			},
			500);
			return false;
		});