The traditional web based computing system does not support web based multitasking. Therefore, when a user via a web user interface displayed in a web browser on an end-user computing device to submit a task of accessing a web server, the user has to wait the task to be finished before can submit a second task from the same web user interface. A method of supporting web based multitasking is disclosed herein for solving above mentioned issue to let user much efficiently perform web based tasks without wasting waiting time.