comparing HTML tables

Hi,

I have table pairs that I need to compare, and produce another table
that shows differences. I can't just open them in separate browser
and look for differences, because I have many such table pairs, and so
this process has to be automated.

Tables can differ in a number of ways - columns and rows can be added
or missing, values of cells can change. To see an example of the
differences, I'm attaching below two tables.

Ideally, I could like some library that would do the comparison,
something that would use the Xerces library.

Any clues would be great.


Thanks,
Irek

******************************

Category		Cost	Total
Link Cost	Cable	0.00	44,615.00
	Fiber	18,575.00
	Channel	26,040.00
	Equipment	0.00
Node Cost	Electrical	130,820.00	163,180.00
	Optical	32,360.00
Total Network Cost			207,795.00

******************************

Category		Cost
Link Cost	Fiber	18,575.00
	Channel	26,040.00
	Equipment	200.00
Node Cost	Electrical	130,820.00
	Optical	32,360.00