I was working on some webpart in sharepoint designer 2010  and i decided to use the default custom paging.
But i noticed the previous link page isn't working it basicalling just takes me back to the start page of the list and not the previous page after a good look i noticed micosoft is using "history.back()" which is suppose to work but it doesn't work well for paged data.

Anyway before i started further investigation i found Hani Amr's solution at the right time and that did the trick.
Hope that helps