Westlake Village-based web advertising firm ValueClick said late Monday that it has divested its Web Clients promotional lead generation business. According to the firm, the deal was worth $45M, in the form of a five year note with an interest rate of five percent. Name of the buyer was not disclosed. ValueClick said the move is part of a strategy to grow its core online marketing services and technology. ValueClick acquired its Web Clients business in 2005 for approximately $141M.