Computers play crucial rule in the people's daily life. It seems that avoiding use of computers is totally impossible now-a-days. Computers are found in everywhere in any devices, for example, in TV sets, cell phones, refrigerators, even microwave oven and laundry machines. One of the best achievements of the computer is the creation of WWW (World Wide Web) which affects many aspects in the people's life. For instance, there is no need to send faxes or mails which can be expensive and time consuming anymore. Instead of those e-mails could be utilized with the use of the internet.