A mobile terminal and controlling method thereof are disclosed, which facilitates a terminal to be used in further consideration of user's convenience. According to at least one of embodiments of the present invention, while a webpage is being displayed in a mobile terminal, a function frequently used by the mobile terminal is available by interconnecting to the webpage despite that the webpage is not closed. The present invention includes storing an object oriented program having a prescribed function, accessing an external server providing a webpage, driving a web browser for a webpage source by receiving the webpage source of the webpage from the external server, and displaying the webpage by rendering the webpage provided by the external server with a modified webpage having the prescribed function reflected thereon in a manner that the web browser configures a document object model tree using the web browser source and the object oriented program together.