This is my sample XML

<?xml version="1.0"?> 
<DOCUMENT>
 <MY_DATA_SET xmlns="">
  <MY_DATA>
  <MY_DATA>
 </MY_DATA_SET>
<DOCUMENT>

I want to remove programetically this part xmlns=""
output should be

<?xml version="1.0"?> 
<DOCUMENT>
 <MY_DATA_SET>
  <MY_DATA>
  <MY_DATA>
 </MY_DATA_SET>
<DOCUMENT>

- let theDocument = getXmlNode(XML,'//DOCUMENT');
(getXMLNode is a function it can give docuemnt node element)
- let testNode = create('<MY_DATA><MY_DATA></MY_DATA></MY_DATA>');   
(create the XML from string)
- let firstChild = theDocument._domNode._firstChild;
(getting the first child from the document)

theDocument.node.insertBefore(testNode.node._documentElement, firstChild);

output is :

<?xml version="1.0"?> 
<DOCUMENT>
 <MY_DATA_SET xmlns="">
  <MY_DATA>
  <MY_DATA>
 </MY_DATA_SET>
<DOCUMENT>

I don want to see this part : xmlns=""
if i try to remove :testNode.node._documentElement.removeAttribute(“xmlns”);
it didn’t work