, it's only used to execute the contrusctor method ?

With a good command of regualr expressions one can parse anything
it's just that most people don't know how to use them properly
while I don't recommend it, it can be done in certain situations

i use regex coach to test it - with your html source

xushi, what value were you wanting to change?

there is no such thing as a good command of regex
all regex is bad!

You're absolutely incorrect. Once you master them, it's pretty straightforward. But, it's like learning a new language.

I agree with MikeSeth, parsing HTML with regexps makes your hair fall out and God kills a kitten

font size="1" with font size="8px"

~parent