Ordering of xml group elements

Question

Hi
I have a Document object created over the xml file, initially having same type of group elements with differen type of information in the predefined order. later if any time i modify it to add new group of same type by default i am able to add it to next sibiling, instead i want to maintain the order.
i am having order number as part of group elemnt attribute order.
e.g
i have initial xml document like below
<product order ="2">
<name/>
<price/>
</product>
<product order ="4">
<name/>
<price/>
</product>
now if the use want to add the anotherelemtn like
<product order ="3">
<name/>
<price/>
</product>
it should go into proper sequence.
How to do this
expected will be
<product order ="2">
<name/>
<price/>
</product>
<product order ="3">
<name/>
<price/>
</product>
<product order ="4">
<name/>
<price/>
</product>

Answer 1

Use the element's append() method if you want to add a child element as the last child, otherwise use its insertBefore() method.