i want to have harry potter school song for my webpage

i am sorry, but i don't have that song, and the song in movie three is not the Hogwarts school song, it is just a performance of Macbeth's "Double, Double Toil and Trouble" by Shakespeare.

1 WITCH. Thrice the brinded cat hath mew'd.
2 WITCH. Thrice and once, the hedge-pig whin'd.
3 WITCH. Harpier cries:—'tis time! 'tis time!
1 WITCH. Round about the caldron go;
In the poison'd entrails throw.—
Toad, that under cold stone,
Days and nights has thirty-one;
Swelter'd venom sleeping got,
Boil thou first i' the charmed pot!
ALL. Double, double toil and trouble;
Fire burn, and caldron bubble.
2 WITCH. Fillet of a fenny snake,
In the caldron boil and bake;
Eye of newt, and toe of frog,
Wool of bat, and tongue of dog,
Adder's fork, and blind-worm's sting,
Lizard's leg, and owlet's wing,—
For a charm of powerful trouble,
Like a hell-broth boil and bubble.
ALL. Double, double toil and trouble;
Fire burn, and caldron bubble.
3 WITCH. Scale of dragon; tooth of wolf;
Witches' mummy; maw and gulf
Of the ravin'd salt-sea shark;
Root of hemlock digg'd i the dark;
Liver of blaspheming Jew;
Gall of goat, and slips of yew
Sliver'd in the moon's eclipse;
Nose of Turk, and Tartar's lips;
Finger of birth-strangled babe
Ditch-deliver'd by a drab,—
Make the gruel thick and slab:
Add thereto a tiger's chaudron,
For the ingrediants of our caldron.
ALL. Double, double toil and trouble;
Fire burn, and caldron bubble.
2 WITCH. Cool it with a baboon's blood,
Then the charm is firm and good.

The real Hogwarts school song was sung in Movie 4, and it was only shown in the deleted scenes in the DVD, the song was also not recorded into the soundtrack, so there's no way to find a the hogwarts school song (unless you record it from the DVD)