public void toXML( TreeNode treeRoot, Element node ) {
		
		if ( treeRoot.ChildNodes == null  ) {
			return ;
		}
		for ( String SituName:treeRoot.ChildNodes.keySet() ) {
			Element nextNode = node.addElement(treeRoot.AttributeName);
			TreeNode childNode = treeRoot.ChildNodes.get(SituName);
			nextNode.addAttribute("value", childNode.SituationName);
			if ( childNode.isLeafNode ) {
				nextNode.setText(childNode.AttributeName);
			}
			toXML( childNode, nextNode );
		}		
	}