var numItensSA = 0;
var SA_actualItem = 1;

$(document).ready(function(){
	startSA();
});

function showItemSA(numItem){
	$('#slidesa-'+numItem).animate({
		opacity: 0
	}, 0);
	$('#slidesa-'+numItem).show();
	$('#slidesa-'+numItem).animate({
		opacity: 1
	}, 500, 'easeInOutExpo', function(){
		SA_oldItem = SA_actualItem;
		if (SA_actualItem == numItensSA){
			SA_actualItem = 1;
		} else {
			SA_actualItem++;
		}
		hideItemSA(SA_oldItem, SA_actualItem);
	});
}

function hideItemSA(oldItem, actualItem){
	$('#slidesa-'+oldItem).delay(5000).animate({
		opacity: 0
	}, 500, 'easeInOutExpo', function(){
		$('#slidesa-'+oldItem).hide();
		showItemSA(actualItem);
	});
}

function startSA(){
	numItensSA = $('.itemslidesa').size();
	showItemSA(SA_actualItem);
}