[wordpress][solution] How do I assign a specific body ID tag to each page

Nick Field ( http://ca.linkedin.com/pub/nick-field/a/219/814 ) asked this question on LinkedIn:
How do I assign a specific body ID tag to each page
http://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&discussionID=20583778&gid=154024&commentID=16774465&trk=view_disc

My answer:

[b:383253d349]Solution how to add a unique ID to your posts or pages:[/b:383253d349]
http://www.ramonfincken.com/uploads/topic216.txt