<input type="text" [color=red]οnkeypress="if ((event.keyCode<48 || event.keyCode>57)) event.returnValue=false"[/color]>文本框只能输入数字

<table id="orderDetailTable" width="100%" border="0" cellspacing="1" cellpadding="0">
<thead id="head">
<tr id="hiddenTr" style="display:none">
</tr>
</thead>
<tbody id="body">
<tr>
<td width="40" ></td>
</tr>
</tbody>

克隆一个对象
var trObj = document.getElementById('hiddenTr');//hiddenTr 为一个tr
var newTrObj = trObj.[color=red]cloneNode(true)[/color];