<html>
<head>
<script type="text/javascript" src="/js/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(":empty").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>
<td>1</td>
<td></td>
<td>John</td>
<td>Oxford Street</td>
<td>2</td>
<td>Bush</td>
<td>George</td>
<td>New York</td>
<td>3</td>
<td>Carter</td>
<td>Thomas</td>
<td>Changan Street</td>
<td>Beijing</td>