This helper method determines the appropriate previous request URL to go pack to the previous page. This will just go directly to the previous space if the last request was a POST. This method assumes that you are switching between Activity Spaces. It does not work well if you want to go back to the previous URL in the same space. This can also be a problem if the user refreshes the page, as this link will then point to the current space.
String URL to go back to
HTMLConstructHelpers Class | com.plumtree.uiinfrastructure.statichelpers Namespace