A B737-200 IN POS AND HOLD FOR TKOF DECLARED AN EMER AND RETURNED TO THE GATE DUE TO SMOKE IN THE COCKPIT CAUSED BY DEICING FLUID LEAKING PAST THE #1 WINDSHIELD.

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AFTER DEICING ACFT WE WERE #1 FOR TKOF ON RWY 6 AT BDL. IMMEDIATELY AFTER GETTING CLRNC FOR TKOF; ALL LIGHTS IN COCKPIT WENT INTO TEST FUNCTION AND WOULD NOT GO OUT. WE CLRED RWY AND NOTICED ODOR IN COCKPIT. ADVISED ATC OF RETURN TO GATE. ON THE WAY ODOR GOT STRONGER. WE CALLED FOR FIRE TRUCKS TO FOLLOW. IT TOOK 3-5 MINS TO GET FROM TKOF POS BACK ON TO GATE. AS WE APCHED THE GATE WE NOTICED SMOKE FROM UNDER CAPT'S GLARESHIELD. PARKED THE ACFT AND EVACED PEOPLE OUT THE JETWAY. SMOKE STOPPED AFTER TURNING OFF ALL ELECTRICAL EQUIP. ON FOLLOW-UP WITH MAINT IT WAS DETERMINED THAT GLYCOL HAD LEAKED FROM CAPT'S WINDSHIELD BEHIND THE INST PANEL AND SHORTED OUT THE WINDSHEAR WARNING SYS AND THE ALT ALERTING SYS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT HAD BEEN RPTED DURING THE PREVIOUS DAYS ABOUT THE CAPT'S WINDSHIELD LEAKING FLUID. THE RPTR STATED THE DEICING FLUID CAUSED DAMAGE TO THE ALT ALERT WARNING AND WINDSHEAR WARNING LIGHT ASSEMBLIES AND WIRING. THE RPTR STATED THE CORRECTIVE ACTION WAS REPLACEMENT OF THE WINDOW.