jInArea()

         Determines if the joystick is on a zone

    Syntax:

         jInArea( nY1, nX1, nY2, nX2 ) -> lInArea

         nY1, nX1, nY2, nX2 : The zone's co-ordinates

    Description:

         Determines if the joystick's controls is into a range.

    Return:

         A logic value indicating if it's inside the specified zone.

    Example:

         If jInArea ( 240, 330, 242, 340 )
           Warning ( "Ok. Joystick is in the middle" )
         EndIf