Many sites have search forms integrated, inclusive w3schools, what is the most used method? google API? Because I thing is pretty dificult to register all site in a database, at least for the momment is hard to think about impementing that. Also I had saw this example http://www.w3schools.com/php/php_ajax_livesearch.asp, but I didn't covered all the subject, because it needs AJAX, JAVASCRIPT, languages that I don't know to use. But if needed... I will learn them, but I want to take the right, simpliest and reliable path. Thank you.