JavaScript实现获取table中某一列的值

JavaScript实现获取table中某一列的值

1、实现源码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JavaScript实现获取table中某一列的值</title>
<script type="text/javascript">
     function getTdValue()
	 {
		var tableId = document.getElementById("tab"); 
		var str = "";
		for(var i=1;i<tableId.rows.length;i++)
		{
			alert(tableId.rows[i].cells[1].innerHTML);
		}
	 }
</script>
</head>

<body style="width:100%; height:100%;">
   <table style="width:100%; height:100%;" id="tab" onclick="getTdValue()" border="1" cellpadding="1" cellspacing="1">
       <tr style="background-color:#CCC;">
         <th>学号</th>
         <th>姓名</th>
         <th>性别</th>
         <th>年龄</th>
       </tr>
       <tr>
         <td>1</td>
         <td>李斯</td>
         <td>男</td>
         <td>22</td>
       </tr>
       <tr>
        <td>2</td>
         <td>王倩</td>
         <td>女</td>
         <td>20</td>
       </tr>
       <tr>
         <td>3</td>
         <td>于谦</td>
         <td>男</td>
         <td>18</td>
       </tr>
       <tr>
        <td>4</td>
         <td>柳浪</td>
         <td>女</td>
         <td>19</td>
       </tr>
       <tr>
         <td>5</td>
         <td>诸葛亮</td>
         <td>男</td>
         <td>20</td>
       </tr>
       <tr>
        <td>6</td>
         <td>东方云</td>
         <td>女</td>
         <td>21</td>
       </tr>
       <tr>
         <td>7</td>
         <td>公孙策</td>
         <td>男</td>
         <td>22</td>
       </tr>
       <tr>
         <td>8</td>
         <td>宝清</td>
         <td>女</td>
         <td>23</td>
       </tr>
       <tr>
         <td>9</td>
         <td>智育</td>
         <td>男</td>
         <td>20</td>
       </tr>
       <tr>
         <td>10</td>
         <td>柳丝丝</td>
         <td>女</td>
         <td>21</td>
       </tr>
   </table>
</body>
</html>

2、设计结果

（1）初始化时

（2）单击第二列时

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JavaScript实现获取table中某一列的值

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