var pictureChanger_position;
var pictureChanger_id;
var pictureChanger_nChildren;
var pictureChanger_fadeTime = 1000;

$(document).ready(function(){
	$.fn.pictureChanger = function(speed)
	{
		pictureChanger_position = 0;
		pictureChanger_id = '#' + this.attr('id');
		pictureChanger_nChildren = $(pictureChanger_id).children('div').length;
		if (pictureChanger_nChildren > 1) {
			$(document).everyTime(speed, function() {
				if(pictureChanger_position >= pictureChanger_nChildren - 1) pictureChanger_position = pictureChanger_nChildren - 1;
				$(pictureChanger_id + ' > div:eq(' + pictureChanger_position + ')').fadeOut(pictureChanger_fadeTime);
				pictureChanger_position++;
				if(pictureChanger_position > pictureChanger_nChildren - 1) pictureChanger_position = 0;
				$(pictureChanger_id + ' > div:eq(' + pictureChanger_position + ')').fadeIn(pictureChanger_fadeTime);
			});
		}
	}
});