The GetPreviousURL method returns the URL of the previous item in the Content Linking List file.
GetPreviousURL( listURL )
This method returns a string containing the URL of the previous item in the Content Linking List file. If the current page is not specified in the Content Linking List file, GetPreviousURL returns the URL of the first page in the file.
GetNextURL, GetNthURL, GetPreviousDescription