Search for the documentation

I'm one of those ppl who find it hard to sit and read documentation especially manuals like the PHP one - presented HTML with no inbuilt search functions. Being a fairly novice programmer and more of a designer I'm not even that familiar with the programming terms to figure out what sections to find what I'm looking for. Sooo -has anyone written a PHP search script for the documentation. I'd like to be able to be able to do it similar to the windows (or most other) find box where it will sort through all the pages until it hits the string I'm after then if that's not it I can hit next and go onto the next matching string that it finds... I guess what I'm thinking of would have to run in a framed html [search at top and manual at bottom] but any other suggestions would be welcomed. Jamie