Can you please keep the lettering proper next time?
“Ther, dey, effekt, pleac, knovs, disaper, wold, lik, to (too).”
That can get really annoying sometimes.
Anyways, I don’t know what text changing effect you mean because all of the text changes in that site.
For the mouse one, when you want it to disappear, you can use mouse.hide; and then make a movieclip that looks like the mouse. Then use the actionscript stringy provided or you can just tween it to where-ever position you need it in, and when you want the real mouse to come back, make the movieclip one disappear by deleting it off the stage or using as, and then use the as code: mouse.show(); on the frame you need it to appear again.