[DiapDealer]

Originally Posted by eschwartz

Or their (RegexBuddy's) free guide here: http://www.regular-expressions.info/

The most helpful regex tutorial I have come across, it is my go-to reference.

I'll second that. Got that puppy on speed-dial.

It would seem to me that none of the parentheses in the expressions being bandied about are actually necessary. Surely

 <a id="page_\d+"></a>

would suffice (a space preceding and following)? Replace it with nothing.