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<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>