为什么只有第一个的弹出才是正确的背景色??????????
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
<style type="text/css">
<!--
.unnamed1 {
background-color: #0000FF;
}
-->
</style>
</head>
<body>
<table width="200" border="1">
<tr>
<td id="aaaa" style="background-color:#000000" onMouseOver="javascript:alert(document.getElementById('aaaa').style.backgroundColor)"> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td id="bbbb" bgcolor="#666666" onMouseOver="javascript:alert(document.getElementById('bbbb').style.backgroundColor)"> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td id="cccc" class="unnamed1" onMouseOver="javascript:alert(document.getElementById('cccc').style.backgroundColor)"> </td>
<td> </td>
<td> </td>
</tr>
</table>
</body>
</html>