white spaces on deleting a node

[Swetha Nekkanti]

Hi,

 I am facing a small problem when I delete a node from an XML DOM.
When,I delete one or more nodes  from the DOM and I serialize the 
resulting DOM,I get white spaces in the parts where the nodes were deleted.

 Does anyone know how to remove these white spaces and why does this 
happen?

Thanks,
Swetha