<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<style type="text/css">
.warning{background-color:Yellow; color:Black};
</style>
<script type="text/javascript">
//样式选择器
$(function () { $(".warning").click(function () {alert("这是警告信息")}) });
</script>
</head>
<body>
<p class="warning">aaa</p>
<div class="warning">aaa</div>
<p class="warning">ccc</p>
<input class="warning" type="button" value="hello" />
</body>
</html>
