How long does weed stay in system?

ok well im now lookin for a job and i dont wana come up positive for that ha ive been smokin everyday for like 4 years straight haha im pretty happy for that but now i need a job i havent smoked for like 2 weeks and i know its goin to take a long time to get out so wondering if anyone can give me tips to have it taken out faster? i know i can take detox pills but dont know were to get em thankS!!!!!!!