网站右侧固定在线客服代码最后一天望老师作业通过

<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){

/* ----- 侧边悬浮 ---- */
$(document).on("mouseenter", ".suspension .a", function(){
var _this = $(this);
var s = $(".suspension");
var isService = _this.hasClass("a-service");
var isServicePhone = _this.hasClass("a-service-phone");
var isQrcode = _this.hasClass("a-qrcode");
if(isService){ s.find(".d-service").show().siblings(".d").hide();}
if(isServicePhone){ s.find(".d-service-phone").show().siblings(".d").hide();}
if(isQrcode){ s.find(".d-qrcode").show().siblings(".d").hide();}
});
$(document).on("mouseleave", ".suspension, .suspension .a-top", function(){
$(".suspension").find(".d").hide();
});
$(document).on("mouseenter", ".suspension .a-top", function(){
$(".suspension").find(".d").hide();
});
$(document).on("click", ".suspension .a-top", function(){
$("html,body").animate({scrollTop: 0});
});
$(window).scroll(function(){
var st = $(document).scrollTop();
var $top = $(".suspension .a-top");
if(st > 400){
$top.css({display: 'block'});
}else{
if ($top.is(":visible")) {
$top.hide();
}
}
});

});
</script>