A computer implemented method of presenting an online application, includes, at a first time, receiving and presenting a first webpage of the online application having a first style, and at a second time, receiving and presenting a second webpage of the online application having a second style that is distinct from the first style. In some embodiments, the first style and second style are in accordance with a user selected variable and the user selected variable has first and second distinct values at the first and second times, respectively. In some embodiments, the user selected variable is independent of the content of the webpages. In some embodiments, the first and second distinct values are determined in accordance with a user profile. In some embodiments, the first webpage is first displayed using the first style and is then re-displayed using the second style, without changing the content of the first webpage.