Use this method to delete text from a CharacterData object .
C
C.deleteData(offset,count)
The method removes characters of count's content
starting at index C, counting from zero.
offset
The must be less than the length of the
data, or this method will raise an offsetxml.dom.IndexSizeErr exception.
However, if the extends past the
end of the string, all characters through the end
of the string will be deleted.
count