function keyboard(action) {
	var prev_elem = document.getElementById('lol_' + posicion);


	if (e.keyCode == 74) {
		posicion++;
	}
	else if (e.keyCode == 75) {
		posicion--;
	}
	if (posicion > posts_por_pagina) {
		document.location = 'loldome.com/...';
	}
	else if (posicion < 0) {
		return false;
	}

	elem = document.getElementById('lol_' + posicion);
	prev_elem.attr('tabIndex', '-1');
	elem.attr('tabIndex', '0');
	elem.focus();
}