<html>
<head><title>表格</title>
</head>
<body>
<table id="table" style="border:1px solid blue;"><tr>
<td><div id='myDivss'><p>p</p></div>
</td></tr>
</table>
<table>
<tr >
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr id="tr2">
<td>5</td>
<td>6</td>
<td>7</td>
<td>8</td>
</tr>
</table>
</body>
</html>
<script>
var tr = document.getElementById("tr2");
var newTr = tr.cloneNode(true);
var table = document.getElementById("table").tBodies[0];
var oldTr = table.insertRow(0);
alert("确认复制~~");
table.replaceChild(newTr,oldTr);
</script>
注意table下有tbody的影响,所以获取时加上tBodies[0].