本文介绍了一种使用JavaScript从HTML表格中获取特定列值的方法。通过点击事件触发，可以读取并显示每行指定列的内容。示例展示了如何在用户交互时获取姓名列的数据。
1、实现源码
复制代码 代码如下:
<!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
<!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>
转自：JavaScript获取table中某一列的值的方法_javascript技巧_脚本之家
http://www.jb51.net/article/49780.htm
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