Hi there, have a look on the google search engine; images search for epley manouevre. you should find loads of links to articles relating to Intermittent Paroxysmal Positional Vertigo (IPPV) (or BPPV for Americans) look also for the Dix-Hallpyke test, which you should use to determine whether the problem lies with the l or r ear.

hope this helps
andy :-)