[lnanek2]

Unfortunately, there isn't any choice. Even now mainstream frameworks like Rails are moving over to loading pages via JavaScript because it is so much faster than performing another large full page load, particularly on the growing segment of power limited mobile devices. Saying you shouldn't show a progress bar and should use the browser functionality is basically saying you have to go back to pages that take seconds to load on a mobile phone instead of milliseconds.

[thierryrietsch]

I agree that a full page load is not required. Also I didn't intend to recommend to use the normal progress bar. It is just from a user perspective a duplication of the bar above. What I intended to say is, that the loading bar should not be used to show a progress is going on. Because the page stays more or less the same and the user is looking with a very high chance at a different area.