JS只能取出Table节点的属性, 而不能取出 TR 或TD 节点的属性 , 很奇怪.为何?
<html><head> <title>Untitled Page</title>
<script type="text/javascript" language="javascript">
function window_onload() 
{
alert( document.getElementById("a").getAttribute("datafld") ) ; alert( document.getElementById("b").getAttribute("datafld") ) ; alert( document.getElementById("c").getAttribute("datafld") ) ; 
}
</script></head><body onload="return window_onload()"> <form id="form1"> <div id="a" datafld="aeff"> <table id="msgTable" style=" 100%"> <tr id="b" datafld="aeff"> <td id="c" title="优先级" datafld="aeff"> ff </td> </tr> </table> </div> </form></body></html>