[ruslan_mart]

window.addEventListener('DOMContentLoaded', function() {
	var elem = document.querySelector('.name'),
		content = document.querySelector('.content'),
		isVisible = true;

	content.addEventListener('scroll', function() {
		var value = 1 - 1 / (this.scrollHeight - this.clientHeight) * this.scrollTop;
		elem.style.opacity = value;
		if(isVisible != !!value) {
			elem.style.display = isVisible ? 'none' : '';
			isVisible = !isVisible;
		}
	});
});