Thanks guys for your information.They were really useful.
Nigel is correct.My 0.1uF and 10uF are located at far end.Its not usefull. I soldered the 10uF direct on regulator pin & soldered 0.1uF ceramic input side of reg.
My major problem was when power OFF & ON again in the circuit the DS1307 RTC is reset condition.The CH bit was always '1',the timer is OFF mode.Even with no load condition. This is due to wall outlet switch noise,relay spikes etc....
After placing decoupling caps on regulator pins the problem was solved.
The ripple scenario is somewhat other,it does not harm much as spike problem.