[j0hnik]

console.log(["iag12.png", "iq10.png", "img2.png", "img1.png"].sort(function(a, b) {
	var aw = a.match(/\D+/)[0],
	bw = b.match(/\D+/)[0],
	ad = a.match(/\d+/)[0],
	bd = b.match(/\d+/)[0];
  return (aw > bw) - (aw < bw) || (ad-bd) - (bd-ad);
}));