We would like to express our sincere thanks to our advisor, Mr.Wichai Buaniaw and Asst.Prof. Thakerng Wongsirichot for their invaluable help and constant encouragement throughout the course of this project. We are most grateful for their teaching and advice, not only the project methodologies but also many other methodologies in life. We would not have achieved this far and this project would not have been completed without all the support that we have always received from them.