javascript: preload images and launch callback

preload_images.js

var images_array =
[
	'https://upload.wikimedia.org/wikipedia/commons/3/3b/Paris_Tuileries_Garden_Facepalm_statue.jpg',
	'https://img.imgur.com/iWKad22.jpg',
	'https://this_image_not_exist'
];

var loadImages = function(arr, callback)
{
	var count = 0;
	var images = [];

	for(var i in arr)
	{
		images[i] = new Image();
		images[i].onload = function()
		{
			console.log(this.src+" image loaded");
			count++;
		};
		images[i].onerror = function()
		{
      			this.setAttribute('data-error', 'true');
			console.log("error loading "+this.src+" image");
			count++;
		};
		images[i].src = arr[i];
	}

	var loop = function()
	{
		if(count===arr.length)
		{
			var tmp = [];
			for(var i in images)
			{
				if(images[i].hasAttribute('data-error')===false)
					tmp.push(images[i]);
			}
			callback(tmp);
		}
		else
		{
			window.setTimeout(function()
			{
				loop();
			}, 0);
		}
	};
	loop();
};

loadImages(images_array, function(images)
{
	console.log(images);
});