<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
<style>
*{
margin:0;
padding:0;
}
</style>
<script>
window.onload = function(){
//event参数接收鼠标事件对象,event是参数名可以随便改
//匿名函数，是由浏览器自动调用的
//相当于function a(); a(MouseEvent);
document.onclick = function(event){
// event做参数IE不兼容
// IE用window.event
// 实现兼容
var e = event || window.event;
console.log(e);
}
}
</script>
</head>
<body>
</body>
</html>
