Exclusive node class.

test.js

var list = document.querySelectAll('a');

function handle_click(event) {
	event.preventDefault();

	for (var i=0, count=list.length; i<count; i++) {
		var link = list[i];
		if (link === this)
			continue;
		link.classList.remove('active');
	}

	this.classList.add('active');
	this.nextNode().scrollIntoView();
}