rem: if( aTreeNode.childNodes[i].nodeName.toLowerCase() == "treechildren" ) 
add: if( aTreeNode.childNodes[i].localName.toLowerCase() == "treechildren" ) 
context: function getTreechildren( aTreeNode ){  if( aTreeNode.childNodes )     {      for( var i = 0; i < aTreeNode.childNodes.length; i++ )      {        if( aTreeNode.childNodes[i].nodeName.toLowerCase() == "treechildren" )          return aTreeNode.childNodes[i];      }      return aTreeNode;    }  return null;}
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