function UploadQueue(options) {
	this.queue = options.queue_element;
	this.previews = options.preview_area;
	this.addEvents();
}

UploadQueue.prototype.addEvents = function() {
	var that = this;
	that.queue.addEventListener('change', function() {
		that.clearArea();
		for (var i = 0; i < that.queue.files.length; i++) {
			that.addPreviewForFile(that.queue.files[i]);
		};
	});
};

UploadQueue.prototype.clearArea = function() {
	this.previews.innerHTML = '';
}

UploadQueue.prototype.addPreviewForFile = function(file) {
	if (!file) {
		return false;
	}

	var preview = document.createElement('img');
	preview.id = ''
	preview.style.maxWidth = '150px';
	preview.style.maxHeight = '150px';

	var reader = new FileReader();
	var that = this;
	reader.addEventListener('load', function() {
		preview.src = reader.result;
		that.previews.appendChild(preview);
	}, false);
	reader.readAsDataURL(file);
};