om.DomNode.appendChild
Adds an existing node at the end of the list of children in the current node.
Syntax
appendChild(
   newChild om.DomNode )
- newChild is a reference to a node.
 
Usage
The appendChild() method takes an existing om.DomNode element
        node and adds it at the end of the children of the object node calling the method.
The child node passed to the appendChild() method must have been created from
    the same DOM document object, for example with the
     om.DomDocument.createElement() method.
If the node passed to the appendChild() method is already attached
                to another parent node, it will be detached from that parent node before being
                attached to the new parent node.
Example
DEFINE parent, child om.DomNode
...
LET child = parent.appendChild("Item")
For a complete example, see Example 1: Creating a DOM tree.