>I have a page which sends a request to an ASP.NET link so the server would return some javascript which would execute some DHTML on the page to add new content.
>
>If the user does that, new content is being added to the page. Then, if he clicks on a link in the page to go somewhere else, hit back, the content that was added dynamically is gone. How can I force the browser to keep its content?

Might depend on the browser. See: http://stackoverflow.com/questions/2638292/after-travelling-back-in-firefox-history-javascript-wont-run