<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单隔行换色</title>
<script>
window.onload=function () {
//1.获取表格
var tbleEle = document.getElementById("tb1");
//2.获取表格中tbody里面的行数(长度)
var len = tbleEle.tBodies[0].rows.length;
//alert(len)
//3.对tbody里面的行数进行遍历
for(var i=0;i<len;i++){
if(i%2==0){
//4.对偶数行设置背景颜色
tbleEle.tBodies[0].rows[i].style.backgroundColor="blue";
}else{
//5.对奇数行设置背景颜色
tbleEle.tBodies[0].rows[i].style.backgroundColor="white";
}
}
}
</script>
</head>
<body>
<table border="1" width="500" height="50" align="center" id="tb1">
<thead>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
</tr>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
</tr>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
</tr>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
</tr>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
</tr>
</tbody>
</table>
</body>
</html>
