extracting certain pattern occuring several times in a certain location

Greetings,

I have a pattern, f.e. option value="4420",
occuring throughout the page, where I need to extract "4420" and pass it to another page as a session varialbe.
My difficulty is that I need to extract this pattern only within certain part of that page.
I can use DATARECORD to isolate the part of the page I want, but then the subpattern will only apply once within the DATARECORD.
Any suggestions?
I think I might need a script that takes as its input the entire DATARECORD and applies regex to it line by line.