方法一，代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>鼠标跟随效果</title>
<style>
body {
margin: 0;
padding: 0
}
#to_top {
width: 30px;
height: 40px;
padding: 20px;
font: 14px/20px arial;
text-align: center;
background: #06c;
position: absolute;
cursor: pointer;
color: #fff
}
</style>
<script>
window.onload = function() {
var oTop = document.getElementById("to_top");
document.onmousemove = function(event) {
var oEvent = event || window.event;
var scrollleft = document.documentElement.scrollLeft || document.body.scrollLeft;
var scrolltop = document.documentElement.scrollTop || document.body.scrollTop;
oTop.style.left = oEvent.clientX + scrollleft + 10 + "px";
oTop.style.top = oEvent.clientY + scrolltop + 10 + "px";
}
}
</script>
</head>
<body style="height:1000px;">
<a href="#">欢迎观看！</a>
<div id="to_top">鼠标跟随</div>
</body>
</html>
鼠标特效
原文地址：https://www.cnblogs.com/ECJTUACM-1435867846/p/11810787.html