table隔行变色

<script src="jquery.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
   $(".stripe tr").mouseover(
       //如果鼠标移到class为stripe的表格的tr上时，执行函数
       function() {
          $(this).addClass("over");
       }
   ).mouseout(
       //给这行添加class值为over，并且当鼠标一出该行时执行函数
       function(){
          $(this).removeClass("over");
       }
   )  
   
   //给class为stripe的表格的偶数行添加class值为alt
   $(".stripe tr:even").addClass("alt");
});
</script>
<style>
th {
        background:#0066FF;
        color:#FFFFFF;
        line-height:20px;
        height:30px;
}
 
td {
        padding:6px 11px;
        border-bottom:1px solid #95bce2;
        vertical-align:top;
        text-align:center;
}
 
tr.alt td {
        background:#ecf6fc;  /*这行将给所有的tr加上背景色*/
}
 
tr.over td {
        background:#bcd4ec;  /*这个将是鼠标高亮行的背景色*/
}
 
</style>

<table class="stripe" width="50%" border="0" cellspacing="0" cellpadding="0">
	<thead>
	  <tr>
		<th>姓名</th>
		<th>Email</th>
	  </tr>
	</thead>
<tbody>
	  <tr>
		<td>邓国梁</td>
		<td>[e-mail]</td>
	  </tr>
	  <tr>
		<td>邓国梁</td>
		<td>[e-mail]</td>
	  </tr>
	  <tr>
		<td>邓国梁</td>
		<td>[e-mail]</td>
	  </tr>
	  <tr>
		<td>邓国梁</td>
		<td>[e-mail]</td>
	  </tr>
</tbody>
</table>