I am having a problem with my inside doors (closet & bathroom) coming off the door frame. Particularly the top hinge. It starts to pull out from the frame which causes the door to not be able to close (or rub excessively on the frame). How do I go about fixing this? Should I take them down & re hang them? Why is only top hinge? How do I rehang them in the same holes?
Thanks.

Are the doors "hollow core" doors and are they hung plumb? If they are usually coming loose at the top that would probably indicate some form of downward pressure being applied at the latch side of the door. Do you have a good solid door frame? Previous repairs or adjustments may have weakened the area around the hinge preventing a solid anchor on the frame side. If all else fails... get a new pre-hung door and replace the ones that you're having trouble with. They don't really cost very much (hollow-core) and you should be able to find the correct size easily.

Are the srews just pulling out of the hinge? If so I have a couple of tips you can use to get the screws back in the same holes.

If The Door Is Coming Loose From The Fram Take Longer Screws Perferably 3" This Is Long Enough To Go Into The Framing In The Wall. Your Door Want Come Down Then , If It Is The Door Hinge That Is Loose Take Some Tooth Picks And Jamb In The Hole And Put The Screw Back, Any Thing Will Work That Plugs The Hole Us. Hope This Helps , Nichols Trim And Carpentry