make polygon in google maps using area name

Question

I work with google map in that my task is show the area using draw dynamic polygon on map.
This polygon should be draw by given area and city name.
 
i want output like this map http://www.justdial.com/Vadodara/Four-Wheelz-%3Cnear%3E-Old-Padra-Road/0265PX265-X265-130706174318-V6N1_VmFkb2RhcmEgQ2FyIERlYWxlcnM=_BZDET/map[^]
 
and for that i try this on but it not work for me so please give me some good code or refernce for doing this task.