CURRENT_FILENAME = ''
when the user doesn't set any pther value
CURRENT_PATHNAME = str_replace('\\','/',$_SERVER['PHP_SELF'])
ERROR_PAGER = -1
ERROR_PAGER_INVALID = -2
ERROR_PAGER_INVALID_PLACEHOLDER = -3
ERROR_PAGER_INVALID_USAGE = -4
ERROR_PAGER_NOT_IMPLEMENTED = -5
PAGER_OK = 0