JavaScript关于DOM操作的一些小问题（1）

题目：实现页面中表格的隔行变色

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    </style>
</head>
<body>
    <ul id="box">
        <li>奇数行</li>
        <li>偶数行</li>
        <li>奇数行</li>
        <li>偶数行</li>
        <li>奇数行</li>
        <li>偶数行</li>
    </ul>
    <input type="button" id="even" value="偶数变色">
    <input type="button" id="odd" value="奇数变色">
</body>
<script>
    //获取按钮
    var oEven = document.getElementById("even");
    var oOdd = document.getElementById("odd");
    //获取box下面的li
    var aLi = document.querySelectorAll("#box li");
    //点击事件
    oEven.onclick = function(){
        for(var i=0;i<aLi.length;i++)
        {
            if( (i+1) % 2 ==0 ){
                aLi[i].style.cssText="background:pink;";
            }else{
                aLi[i].style.background = "green";
            }
        }
    }
    oOdd.onclick = function(){
        for(var i=0;i<aLi.length;i++)
        {
            if( (i+1) % 2 !=0 ){
                aLi[i].style.background = "blue";
            }else{
                aLi[i].style.background = "orange";
            }
        }
    }
</script>
</html>

posted on 2020-05-14 09:43 Huskie! 阅读(184) 评论(0) 收藏举报