Firs Day Of Week UNIX

Hi gang, I need a bailout. I have a fields called "sys_first_day_of_week" and the user can select one value which will be from a menu with these options: Monday Tuesday Wednesday Thursday Friday Saturday Sunday Based on this "Preference" and TODAYS DATE, I want to calculate the first day of the week. So if my preference is "Monday" and Today's date is 10/19/2010, I want to return a value of: 1287374400 (which is 10/18/2010) if my preference is "Wednesday" and Today's date is 10/19/2010, I want to return a value of: 1286942400 (which is 10/13/2010) Appreciate any help. Don Wieland D W D a t a C o n c e p t s ~~~~~~~~~~~~~~~~~~~~~~~~~ donw@dwdataconcepts.com Direct Line - (949) 336-4828 Integrated data solutions to fit your business needs. Need assistance in dialing in your FileMaker solution? Check out our Developer Support Plan at: http://www.dwdataconcepts.com/DevSup.html Appointment 1.0v9 - Powerful Appointment Scheduling for FileMaker Pro 9 or higher http://www.appointment10.com For a quick overview - http://www.appointment10.com/Appt10_Promo/Overview.html