var speed_bg = 200;
$(document).ready(function(){
	$('.banner_content').each(function(){
		banner_ch(this);
	});
	
});

function banner_ch(obj){
	var count_image = $(obj).find('img').length;
	var counter = 1;
	setInterval(function(){
			if (counter == count_image)
			{
				next_image = 1;
			}
			else
			{
				next_image = counter + 1;
			}
			change_img_bg(obj, counter, next_image);
			counter++;
			if (counter > count_image)
			{
				counter = 1;
			}
	}, 4000);
}

function change_img_bg(obj, id_bg,next_bg){
	$(obj).find('#'+id_bg).fadeOut(speed_bg);
	$(obj).find('#'+next_bg).fadeIn(350);
}