1. A method for communicating between a first web application associated with a first browsing domain and a second web application associated with a second browsing domain different from the first browsing domain, the method comprising: a step for loading and for displaying concurrently at least two sub-pages of a web page, a first sub-page being used for displaying a first user interface of the first web application, a second sub-page being used for displaying a second user interface of the second web application being executed independently of the first web application, the first and second web applications being implemented within a browser accessing a local database, said local database being specific to said browser and configured for recording data supplied by a database software module loaded into said browser and to prohibit access to the data stored for a particular software module associated with a particular browsing domain to any software module loaded into the browser which is not associated with said particular browsing domain, a step for storing data, by a first software module of the first web application, in said local database; a step for reading, by a second software module of the second web application, data written in said local database by the first software module, the first and second software modules being associated with a third browsing domain, wherein the browser dynamically loads the first, respectively second, software module owing to the presence in the first, respectively second, web sub-page of a first, respectively a second, reference to the third browsing domain.