Inserts the node new_child before the existing child node ref_child.
CL_DomNode CL_DomNode::insert_before( CL_DomNode & new_child, CL_DomNode & ref_child);
Detailed description:
If refChild is a null node, inserts new_child at the end of the list of children.
If newChild is a DocumentFragment object, all of its children are inserted, in the same order, before ref_child. If the new_child is already in the tree, it is first removed.