title: GetElementByTagName does not work on Sharepoint 2013 after update
body: <p>since I´ve updated to Sharepoint 2013 my Script does not generate any forms anymore. I'am using a function to load a XML file </p>
  
  <pre><code>function LoadXMLfromSP(xmlfile){
  
        var xml = $.ajax({
  
          type: "GET",
          url: xmlfile,
          dataType: "xml",
          async:false,
  
  
  
        }).responseText;
        xmlDoc = $.parseXML(xml)
  
        return xmlDoc;
  
  }
  
  xmldoc = LoadXMLfromSP('https://mysite.de/form.xml');
  </code></pre>
  
  <p>console.log shows me that the xml object were sucessfully loaded but if i try</p>
  
  <pre><code>var obj = xmlobject.getElementsByTagName(node);
  </code></pre>
  
  <p>I got the message that this object does not support "GetElementsByTagName".
  I tried anything at least deleting whitespaces in the xmldoc but the problem still exists. </p>
  
  <p>As already mentioned: Before updating to Sharepoint 2013 everything worked perfectly (with IE, except Firefox and Chrome where I already experinced this issue before the Sharepoint update). But now, no matter which browser i use i got this error message and my script stops.</p>
  
  <p>I hope that anyone can give me a hint or point me in the right direction to fix this issue. Thanks very much in advance!</p>