本代码主要演示的是for循环,

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>JavaScript for循环实现表格隔行变色</title>
    <script>
        window.onload=function () {
            oTab = document.getElementById('tab1');

            for(var i=0;i<oTab.tBodies[0].rows.length; i++){
                if(i%2){
                    oTab.tBodies[0].rows[i].style.backgroundColor='green';
                }else {
                    oTab.tBodies[0].rows[i].style.backgroundColor='lightgreen'
                }
            }

        }
    </script>
</head>
<body>
<table id="tab1" width="500px" border="1px grap solid">
    <thead>
        <tr>
            <td>ID</td>
            <td>NAME</td>
            <td>AGE</td>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>01</td>
            <td>Apollo</td>
            <td>28</td>
        </tr>
        <tr>
            <td>02</td>
            <td>Ann</td>
            <td>25</td>
        </tr>
        <tr>
            <td>03</td>
            <td>Merry</td>
            <td>26</td>
        </tr>
        <tr>
            <td>04</td>
            <td>John</td>
            <td>26</td>
        </tr>
        <tr>
            <td>05</td>
            <td>Eva</td>
            <td>28</td>
        </tr>
    </tbody>
</table>
</body>
</html>