Normally, if you contact the dealer through their web site, you will get the attention of the Web-salesperson. That person could be the manager; however, most likely is not. If you contact the Web-salesperson, insure that you don't "walk in" and talk to a normal salesperson. They have different expectations regarding commission, etc. If you do "walk in" ask to see the Web-salesperson - this really simplifies things and avoids hard feelings between the sales staff. Normally the Web-salesperson receives a flat fee for a sale and the normal salesperson receives a commission (plus a possible periodic bonus).
Go 'armed' regarding pricing and options that you want prior to the initial contact.