Web application developing has become a significant area,
which has a great progress among other fields of software
engineering. Web application has essential characteristics
which have made it different from other ones. Web
applications consist of some modules and interactive
components in which various technologies could be used
independently. It is important to note that in addition to the
growth of web applications, the techniques used in web
application developing have also great growth. So this fact
makes web application testing more difficult.