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Use js to achieve the color changing effect of alternate rows in the table
Use js to achieve the color changing effect of alternate rows in the table
First of all, let’s take a look at the effect of the implementation, as shown in the figure below:
Idea:
OK Event: document loading is completed onload 2. The event needs to trigger the function: init() 3. Function: To operate the elements of the page, you need to operate each row in the table and dynamically modify the background color of the row
Specific code:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<script >
function init(){
//得到表格
var tab = document.getElementById("tab");
//得到表格中每一行
var rows = tab.rows;
//便利所有的行,然后根据奇数 偶数
for(var i=1; i < rows.length; i++){
var row = rows[i]; //得到其中的某一行
if(i%2==0){
row.bgColor = "yellow";
}else{
row.bgColor = "red"
}
}
}
</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>操作</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>1</td>
<td>手机数码</td>
<td>华为,小米,尼康</td>
<td>黑马数码产品质量最好</td>
<td>
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改</a>|<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a>
</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>2</td>
<td>成人用品</td>
<td>充气的</td>
<td>这里面的充气电动硅胶的</td>
<td><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改</a>|<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a></td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>3</td>
<td>电脑办公</td>
<td>联想,小米</td>
<td>笔记本特卖</td>
<td><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改</a>|<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a></td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>4</td>
<td>馋嘴零食</td>
<td>辣条,麻花,黄瓜</td>
<td>年货</td>
<td><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改</a>|<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a></td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>5</td>
<td>床上用品</td>
<td>床单,被套,四件套</td>
<td>都是套子</td>
<td><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改</a>|<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a></td>
</tr>
</table>
</body>
</html> Recommended tutorial: js introductory tutorial
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