If you were to log in, you'd be able to get more information on your fellow community member.
In response to Alberto's comment about Mastering Regular Expressions, It should be noted that the book is not titled Regular Expression Cookbook for the Web.
It is however one of the clearer and more complete reference to Regular Expressions and it has proven very useful to me with Perl, PHP, vi, sed, grep, Visual Studio and so on. The book tries to explain the concept of Regular Expression, not their use. To limit regular expressions solely to the web sites and HTML is like limiting the use of electricity solely to lighting, an aberration.