function cargar_img(file) {
	$(function () {
		$("#big img").remove();
		var img = new Image();
		$("#big").addClass("loading");
		$(img)
		.load(function () {
			$(this).hide();
			$('#big')
			.removeClass('loading')
			.append(this);
			$(this).fadeIn();
		})
		.error(function () { /* notify the user that the image could not be loaded*/	})
		// *finally*, set the src attribute of the new image to our image
		.attr('src', file);
	});
}