请教，如何disable整张表格(table)

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" charset="GB2312">
<title>&Icirc;&THORN;±ê&Igrave;&acirc;&Icirc;&Auml;&micro;&micro;</title>
<script language="javascript">
function disable() 
{var pnode = document.getElementById("aaa");
var radioes = pnode.getElementsByTagName("input");for (var i=0; i<radioes.length; i++)
{
if (radioes[i].type == 'radio')
{  radioes[i].disabled = true; }
}
}function release() 
{var pnode = document.getElementById("aaa");
var radioes = pnode.getElementsByTagName("input");for (var i=0; i<radioes.length; i++)
{
if (radioes[i].type == 'radio' && radioes[i].disabled)
{   radioes[i].disabled = false; }
}
}</script>
</head>
<body><form name="form1">
<table width="200" border="1" cellspacing="0" cellpadding="0" id="aaa">
<tbody>
<tr>
<td>
<input type = "radio" name = "111" checked>Enable</input><input type = "radio" name = "111" >Disable</input>
</td>
</tr>
<tr>
<td>
<input type = "radio" name = "333" checked>Enable</input><input type = "radio" name = "333" >Disable</input>
</td>
</tr>
</tbody>
</table>
</form>
<br>
<input type="button" name="replaceNode" value="Disable" onClick="disable()">
<input type="button" id="release" name="release" value="Release It!!" onclick="release();">
</body>
</html>