How to split text according to the textfield size

Hi, its very urgent if anybody can help me out..... i am
working on an e-learning course where all the text is coming
through XML. Client is very specific about not to use scrollbar.
They want to use more and back buttons to show the rest of the text
(they dont want the text to be scrolled either). For that I created
a function to part the text according to the textfield height in an
array. (one important point is that user can change font type, font
size anytime in between the course). Here is a bit of code
This code is working fine, but it gives undesired output if
we use html tags in helpText
please help me out..... please

Thanks FlashTastic,
I am sorry for not being able to convey my problem....
actually problem is not that code is not recognizing the tags but
the problem is.... let me explain, suppose there is a tag 
and in xml..... code split the text so it split
 and too and stored it in an array.... then it
adds the text i.e. This is a sample text.....
til the textheight of the textfield is less than the ._height of
hte textfield and finally i have a string that fits in the
textfield perfectly and when the parted text is assigned to the
textfield it recognize the tag and make that bunch of words or
sentence bold and that creates the problem.... i hope that this
time it is more clearer....
Thanks again.....

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