hi ranga,
don't get confused. opening prices are nothing but the first traded price (the first trade that has taken place in the script). highs and lows are made subsequently during the day.
sometimes the days opening may be the days high or low as the case may be, but not necessarily.
for example let Scritp A closed at Rs.100. the next day the first traded price is Rs.100.50 then thats the opening price. during the day its moves up to Rs. 104.25 to make a high, lets say at 11.30am. later it falls back and closes at Rs.103.50. now if the price of the said script does not falls below Rs.100.50 during the day, then we can say that the opening price is same as days low.
this can only and only be said when we have the complete picture.
cheers,
jdm.