第一个事件如此好玩
<!DOCTYPE html>
<html>
<head>
<title>事件</title>
<div style="width: 100px;height: 100px; background-color: pink;" onclick="clickOK(this)"></div>
</head>
<body>
</body>
</html>
<script type="text/javascript">
function clickOK(x) {
x.style.background='red';
}
</script>