title: IE10 javascript access xml element issue
body: <p>I have 3 files, (htm, xml, js) to work together fine in IE8, but in IE10 the javascript cannot get xml element:</p>
  
  <p>getxml.htm</p>
  
  <pre><code>&lt;html&gt;
      &lt;head&gt;&lt;title&gt;getxml.htm&lt;/title&gt;&lt;/head&gt;
  
      &lt;xml id="myxml" src="myxml.xml"&gt;&lt;/xml&gt;
      &lt;script src="getxml.js" language="javascript" type="text/javascript"&gt;&lt;/script&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>myxml.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt;
  &lt;publish&gt;
  &lt;/publish&gt;
  </code></pre>
  
  <p>getxml.js</p>
  
  <pre><code>get_xml_content();
  function get_xml_content() {
      alert("get_xml_content");
      alert(myxml);       // ie8: [object], ie10: [object HTMLUnknownElement]
      var xmle=myxml.getElementsByTagName("publish").item(0);  
      alert(xmle);        // ie8: [object], ie10: null
  }
  </code></pre>
  
  <p>Alert message from IE8 and IE10 are written as comments above in getxml.js.</p>
  
  <p>Appreciate any help, thanks!</p>