#navigation a.incentives { background: transparent url(../images/navi/incentives.gif) no-repeat right top; display: block; }
#navigation a.events { background: transparent url(../images/navi/events.gif) no-repeat right top; display: block; }
#navigation a.conferences { background: transparent url(../images/navi/conferences.gif) no-repeat right top; display: block; }
#navigation a.planning { background: transparent url(../images/navi/planning.gif) no-repeat right top; display: block; }

#navigation a.incentives_act, #navigation a.incentives:hover  { background: transparent url(../images/navi/act_incentives.gif) no-repeat right top; display: block; }
#navigation a.events_act, #navigation a.events:hover  { background: transparent url(../images/navi/act_events.gif) no-repeat right top; display: block; }
#navigation a.conferences_act, #navigation a.conferences:hover  { background: transparent url(../images/navi/act_conferences.gif) no-repeat right top; display: block; }
#navigation a.planning_act, #navigation a.planning:hover  { background: transparent url(../images/navi/act_planning.gif) no-repeat right top; display: block; }