获取到了Div的ID，怎么是空的呢？
<div id= "NewsInfo ">
<ul id= "newsbox "> <li> loading... </li> </ul>
</div>

var News_Info = document.getElementById( "NewsInfo ");
通过ajax调用，得到responseXML
js解析之后，
var xRows = xmlDoc.getElementsByTagName( 'NewsDetails ');

var Newsdata = " <ul> ";
for(i = 0;i < xRows.length;i++)
{
Newsdata += " <li> <div> <a href= ' " + xRows[i].childNodes[1].firstChild.nodeValue + " ' target = '_blank '> " + xRows[i].childNodes[0].firstChild.nodeValue + " </a> </div> ";
Newsdata += " <div> " + xRows[i].childNodes[2].firstChild.nodeValue + " </div> ";
Newsdata += " <div> " + xRows[i].childNodes[3].firstChild.nodeValue + " </div> ";
Newsdata += " <div> " + xRows[i].childNodes[4].firstChild.nodeValue + " </div> ";
Newsdata += " </div> </li> ";
}
打印出来没有问题

下面News_Info.innerHTML = Newsdata + " </ul> "
就报错了，提示News_Info为空或者不是对象？

怎么解决呢？急急急

[解决办法]
，，查查是否有重名NewsInfo的元素
[解决办法]
１．检查查查是否有重名NewsInfo的元素

２．试试
function $get(Id)
{
if(document.getElementById(Id))
return document.getElementById(Id);
else
return document.all[Id];
}

$get(NewsInfo).innerHTML =Newsdata + " </ul> ";

[解决办法]
var context = NewsInfo;
context.innerHTML = ＂... ";