function rotatorNext() {
        $('#banner-interno :first-child').animate({ opacity:0 , left:"+=30px"}, time_trans)
                                         .next('img').css('left','-60px').animate({ opacity:1 , left:"-30px"}, time_trans).end().appendTo('#banner-interno');
        clearInterval(inter);
        inter = setInterval('rotatorNext()', time_troca);
};

function rotatorPrev() {
        $('#banner-interno img:first-child').animate({ opacity:0 , left:"-=30px"}, time_trans);
        $('#banner-interno img:last-child').css('left','0px').animate({ opacity:1 , left:'-30px'}, time_trans).prependTo('#banner-interno');
        clearInterval(inter);
        inter = setInterval('rotatorNext()', time_troca);
};

$(function(){

        if( $('#banner-interno img').length > 1 ){

                var setas = '<div id="setas" class="banner-hover"><a href="#" class="a-prev"></a><a href="#" class="a-next"></a></div>';
                $(setas).insertAfter('#banner-interno');

                $("#setas a.a-prev").css('opacity',0.3).click(function (){
                        rotatorPrev();
                        return false;
                });
                $("#setas a.a-next").css('opacity',0.3).click(function (){
                        rotatorNext();
                        return false;
                });

                $('.banner-hover').hover(
                        function(){$("#setas a").css('opacity',0.8)},
                        function(){$("#setas a").css('opacity',0.3)}
                );


                $(document).keydown(function (event) {
                        if (event.keyCode == 37) {
                                rotatorPrev();
                        } else if (event.keyCode == 39) {
                                rotatorNext();
                        }
                });

                $('#banner-interno img:gt(0)').css('opacity',0);
                inter = setInterval('rotatorNext()', time_troca);

        } else if ( $('#banner-interno img').length == 0 ){
                $('#banner-interno').hide();
        }
});