<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<style type="text/css">
div{
height:150px;
width:150px;
background-color:green;
margin-top:10px;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$(".mydiv span").css("color","red");
})
})
</script>
</head>
<body>
<div class="mydiv">
<span>武林網</span>
</div>
<div class="anotherdiv">
<span>武林網</span>
</div>
<button>點擊查看效果</button>
</body>
</html>
