{% set order = order|default('postDate') %}
{% set section = section|default('news') %}
{% set data = craft.entries.section(section).order(order) %}
{# Get the prev/next elements #}
{% set prevEntry = entry.getPrev(data) %}
{% set nextEntry = entry.getNext(data) %}
{% if prevEntry %}{% endif %}
{% if nextEntry %}{% endif %}