<script type="text/javascript">
function fun1(){
//拿到tr元素
var oTr = document.getElementsByTagName("tr")[0];
var nodeFir = oTr.childNodes[1];
var nodeLast = oTr.childNodes[5];
console.log(oTr.childNodes);
var str = nodeFir.innerHTML;
document.getElementById("info1").innerHTML = "第一个节点的内容：" + str + "<br/>";
var str1 = nodeLast.innerHTML;
document.getElementById("info1").innerHTML = "最后一个节点的内容：" + str1;
}
</script>
</head>
<body onload="fun1()">
<table border="1" cellpaddding="0" cellspacing="0" >
<tr>
<td>Jack</td>
<td>Tom</td>
<td>Rose</td>
</tr>
</table>
<p id="info1"></p>
</body>
