css实现的，用expression但在实际中部建议使用，占用资源而且firefox浏览器不支持
.db tr{ background-color:expression('#000000,#333333,#555555,#777777,#999999,#bbbbbb,#dddddd,#ffffff'.split(',')[rowIndex%8]); }                                                           [Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]
就两颜色的时候可以改这这样
<style>
.dbtr{
background-color:expression('#abcdef,#123456'.split(',')[rowIndex%2]);
}
</style>

.db { border-collapse:collapse;} .db tr{ background-color:expression('#F8F8F8,#EFEFEF'.split(',')[rowIndex%2]); } &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]
如果真想用，可以用下面的js写的
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]