The WWW (World Wide Web) has become an indispensable part of millions of peoples who use online services e.g. online banking, online shopping, social networking, e-commerce, store and manage user sensitive information etc. In fact, it is a popular tool for any class of user over the Internet. Rich Web based applications are available over the World Wide Web to provide such types of services. At the same time, the Web has become the predominant mean for people to interact with each other, do business, and participate in democratic processes. This is the positive side of this technology.