yige.org 试一个

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript"> 
 
$(document).ready(function(){
    $("tr:lt(2)").css("background-color","#B2E0FF");
});
 
</script>	
 
</head>
<body>
<h1>Welcome to My Web Page</h1>

<table>
<tr>
<th>Id</th>
<th>LastName</th>

<th>FirstName</th>
<th>Address</th>
<th>City</th>
</tr>

<tr>
<td>1</td>
<td>Adams</td>
<td>John</td>
<td>Oxford Street</td>

<td>London</td>
</tr>

<tr>
<td>2</td>
<td>Bush</td>
<td>George</td>
<td>Fifth Avenue</td>
<td>New York </td>
</tr>

<tr>
<td>3</td>
<td>Carter</td>
<td>Thomas</td>
<td>Changan Street</td>
<td>Beijing</td>
</tr>

<tr>
<td>4</td>
<td>Obama</td>
<td>Barack</td>
<td>Pennsylvania Avenue</td>
<td>Washington</td>
</tr>

</table>

</body>
</html>

结果:

编辑上面的代码，点击查看结果。

yige.org - 试一个