check parent text present between child nodes

Hi i am struck with this situation

XML is like this
<element1>this is element1 text<newElement1>this is newElement1
text</newElement1>element1 text continue<newElement2>this is newElement2
text</newElement2><newElement3>this is newElement3 text</newElement3>

now i want to find that whether newElement1 and newElement2 containing text
of element1 or not same with newElement2 and newElement3.



please note that there will not be any new line character or any character
that seprate the text of element1