Acknowledgement

I would like to take this opportunity to express my sincere thanks towards my supervisor, Dr. Ludwig Chang. During our discussion, he not only has given his invaluable advice for my project, but also has showed his patience and encouragement, that’s really support me a lot. Besides, I would like to thank to my classmates helping me on the technical problems I encountered, and stress I suffered. Without their help, this project may not be finished so smoothly. Also, I would like to thank all the staffs in Hong Kong Baptist University who teach me a lot about the academic stuffs, which are useful for my whole life. Finally, I would like to express my special thanks to the ones who have helped me to distribute the questionnaires and all respondents, who spent their valuable time in filling out the questionnaire. Thanks God. Following the advent of the Web 2.0, the number of social networking site i