在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
<script>
function displayResult(){
	var table=document.getElementById("myTable");
	for (var i=0;i<table.rows[1].cells.length;i++){
		alert(table.rows[1].cells[i].headers);
	}
}
</script>
</head>
<body>

<table id="myTable" border="1" width="100%">
	<tr>
		<th id="name">名称</th>
		<th id="email">Email</th>
		<th id="phone">电话</th>
		<th id="addr">地址</th>
	</tr>
	<tr>
		<td headers="name">John Doe</td>
   		<td headers="email">someone@example.com</td>
   		<td headers="phone">+45342323</td>
   		<td headers="addr">Rosevn 56,4300 Sandnes,Norway</td>
 	</tr>
</table>
<br>
<button type="button" onclick="displayResult()">获取第二行的单元格表头</button>

</body>
</html>
源代码

动行结果
