An adaptation system adapts a web page, which is developed to be displayed by a web browser, to be displayed by client-side code of an application. When a web server receives a request for a web page, it determines whether the request was sent from a client device executing client-side code or from a non-client device executing a browser. If the request is from a client, then the web server uses the adaptation system to adapt the web page to the environment of the application. The adaptation system may modify the web page so that the menus of the web page are not displayed when the web page is displayed within a window of the application. The adaptation system may also modify links of the content of the web page to reference forms of the application, rather than other web pages.