Dear friend roboticus
As i have mentioned its a drawback as it closes only foreground windows, I mean that I want to close the windows in background also(I apologize you as I did not mention this) I don't want to disturb the fore ground windows as i am scheduling my script after converting it to executable file. So as it starts its job in background i want none of the foreground processes to be disturbed.
Thanks for your valuable time.. :)