<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>滚动公告栏</title>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
<style type="text/css">
body{padding: 0;margin:0;background-color:#f9f9f9}
.ul1{list-style: none;margin: 0}
li{padding: 5px;}
</style>
</head>
<body>
<div style="height: 60px;background-color: #191e29;">
<p style="margin: 0;color: #fff;line-height: 60px;text-align: center;">这是用jQuery实现的上下滚动公告栏</p>
</div>
<div style="background-image: url(timg.jpg); margin:15px 90px 0 90px;padding-left: 310px; height: 600px;">
<div style="position: relative;height: 26px;overflow: hidden;">
<ul class="ul1">
<li>K先生：我求求你嫁给我</li>
<li>K先生：等你老了，我依然背着你</li>
<li>K先生：我给你当拐杖</li>
<li>K先生：等你没牙了，我就嚼碎了再喂给你吃</li>
</ul>
<img style="position: absolute;top: 9px;left: 20px" width="15px" height="15px" src="laba.png">
</div>
</div>
<script type="text/javascript">
$(function(){
var num=$(".ul1").find("li").length;
console.log("直接运行"+num);
if (num>1) {
setInterval(function(){
$('.ul1').animate({
marginTop:"-26px"
},500,function(){
$(this).css({marginTop : "0"}).find("li:first").appendTo(this);
});
}, 3000);
}
});
</script>
</body>
</html>
