利用js实现表格隔行换色效果

互联网 20-5-15

首先我们来看一下实现的效果，如下图所示：

思路：

确定事件: 文档加载完成 onload 2. 事件要触发函数: init() 3. 函数:操作页面的元素要操作表格中每一行动态的修改行的背景颜色

<!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>

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