for those who are insistent on using w3schools, also do a google for w3fools, as it'll clue you in on why many many experienced web guys refuse to recommend w3schools.
honestly, you come on hexus, start a thread asking for help, then when recommended not to follow w3schools, you think you know better and go with it anyway.
codeacademy is a good shout, code club, codedojo etc.
the w3c's code reference is all you need once you've worked out how it all hangs together.
http://www.w3.org/TR/html4/cover.html#minitoc