<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function init(){
var tab =document.getElementById("tab") //得到表格
var rows = tab.rows
for (var i = 1;i <rows.length;i++) {
if (i%2 == 0) {
rows[i].bgColor = "red"
} else{
rows[i].bgColor = "yellow"
}
}
}
</script>
</head>
<body onload="init()">
<table border="1px" width="600px" id="tab">
<tr>
<td>
<input type = "checkbox" />
</td>
<td>分类ID</td>
<td>分类名称</td>
<td>分类商品</td>
<td>分类描述</td>
<td>分类操作</td>
</tr>
<tr>
<td>
<input type = "checkbox" />
</td>
<td>1</td>
<td>手机数码</td>
<td>华为，小米</td>
<td>黑马数码智联最好</td>
<td>
<a href="#">修改</a> <a href="#">删除</a>
</td>
</tr>
<tr>
<td>
<input type = "checkbox" />
</td>
<td>2</td>
<td>分类名称</td>
<td>分类商品</td>
<td>分类描述</td>
<td>分类操作</td>
</tr>
<tr>
<td>
<input type = "checkbox" />
</td>
<td>3</td>
<td>分类名称</td>
<td>分类商品</td>
<td>分类描述</td>
<td>分类操作</td>
</tr>
<tr>
<td>
<input type = "checkbox" />
</td>
<td>4</td>
<td>分类名称</td>
<td>分类商品</td>
<td>分类描述</td>
<td>分类操作</td>
</tr>
<tr>
<td>
<input type = "checkbox" />
</td>
<td>5</td>
<td>分类名称</td>
<td>分类商品</td>
<td>分类描述</td>
<td>分类操作</td>
</tr>
</table>
</body>
</html>
原文：https://www.cnblogs.com/yaobiluo/p/13200217.html