<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script>
//window.onload页面加载完毕以后再执行此代码
window.onload = function () {
//1.获取事件源
var img = document.getElementById("box");
//2.绑定事件(悬停事件：鼠标进入到事件源中立即出发事件)
img.onmouseover = function () {
//3.书写事件驱动程序(修改src)
img.src = "image/jd2.png";
}
img.onmouseout = function () {
this.src = "image/jd1.png";
}
}
</script>
</head>
<body>
<img id="box" src="image/jd1.png" style="cursor: pointer;border: 1px solid #ccc;"/>
</body>
</html>
