ValueClick Inc. said Wednesday that it has entered into a partnership with Searchbutton.com to provide banner advertisements triggered by keyword searches. The deal means that Searchbutton, Mountain View, Calif. and ValueClick Inc., Westlake Village, Calif., will resell each other's services. Searchbutton sells private-label search engines, which are used by large companies to create customized searches on their sites. ValueClick Inc. is an advertising network that uses a pay-per-click model. The two companies have also agreed to co-promote services through Web pages, seminars, conferences and white papers.