MD-82
Flight Crew Air Transport Pilot (ATP)
Time Pressure; Workload
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; General Maintenance Action; General Declared Emergency
Aircraft
Climbing out above 10;000 FT; pressurization Transfer Lockout and Standby ON lights illuminated.  First Officer was flying and I went to the QRH.  The procedure called for the switch to STBY then Primary.  STBY ON light extinguished.  Before procedure could be completed (as the aircraft was cleared to 16;000 feet) the CABIN ALT warning sounded; the cabin altitude and Passenger O2 ON light illuminated.  Immediately descended; emergency declared with ATC and clearance was received to 9;000 and then 5;000 FT.  Flight attendants called the cockpit to notify of mask deployment.  Aircraft diverted.  Airfield Rescue and Fire Fighters inspected aircraft after landing and we proceeded to gate.
During climb out at 14;000 FT; an MD-80 Pressurization TRANSFER LOCKOUT/STANDBY ON light illuminated followed shortly by the cabin altitude horn and the passenger O2 light. An emergency was declared and the flight diverted to a nearby airport.