How long do opiates stay in your system.?

If you take Vicodin (I know its not spelled right), how long would it take to clear out of your system? I mean if you were to take a urine drug test, how long would a person have to wait in order to be cleared from the test?

: http://alcoholdrugstreatment.info/how-long-do-opiates-stay-in-your-system-2