$(document).ready(function() {  
	setTimeout("rotateDIV()",5000);
});
nbrDiv = 3;
i = 1;
function rotateDIV() {
	$('.rf_rollBg_active').fadeOut(function(){
    $('.divImg' + ((i)%nbrDiv+1) ).fadeIn(function(){
      $(this).addClass('rf_rollBg_active'); 
    });
    i++;
    $(this).removeClass('rf_rollBg_active');
  });
	setTimeout("rotateDIV()",5000);
}