potty trainining

Question
Our dog is a sheppard husky mix. Every time we leave the house and he is alone he will go potty in the house. We let him out often during the day. If we leave for 5 minutes or a couple of hours,he will go. If we are home he will not go. He can hold it for up to 10 hours when we sleeping, And many hours while we are home. He is 4 yrs. old. We got him from his previous owner who said she never had this problem. She does have another dog that was home with him when she would go out. Please help us with any info. that you can. He is such a good dog. Thank you John.

Answer
Here are some documents pertaining to housetraining:

http://www.marinhumanesociety.org/Behavior/Handouts/Housetraining.pdf
http://www.ddfl.org/behavior/retrain-dog.pdf     
http://www.ddfl.org/behavior/crate-train.pdf
http://www.hsmo.org/m_obedience/behavior/dogcrate.html
http://www.hsmo.org/m_obedience/documents/CanineHousesoilingProblems.pdf
http://www.ddfl.org/behavior/clean-stains.pdf