jumping and visitors

Question
I have a 5 month old bitch that will not stop jumping up on people and everything. also when a visitor arrived she barked furiously (on a lead) and did a nervous wee which has never happened before. I did a lot of socialising when she was younger but she barks at everyone she sees and then if she gets close jumps all over them. she does understand no but seems very willful. I bought her from a breeder of dogs with very good temperament.

Answer
The key to most behavior problems is approaching things using the dog's natural instincts.  Dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog.  Life is much easier if the 2 legged pack members outrank the 4 legged ones.  You can learn to play the role of top dog by reading some books or going to a good obedience class. A good obedience class or book is about you being top dog, not about rewarding standard commands with a treat. Start at http://www.dogsbestfriend.com/  For more on being top dog, see http://www.dogbreedinfo.com./topdogrules.htm