Pass the value between 2 pages

[aolympio]

Hello people.

Take a look to this case:

I have one button in a page X. When click on the button, I disable its and initialize a processament in another page Y.
When this processment ens, I enable the button again.

Question:

How can i enable this button after the the processment in the page Y?

Thanks for everything,
Anderson Olympio