layouts/partials/nav-headers.html

{{ if or (or (isset .Params "navprev") (isset .Params "navup")) (isset .Params "navnext") }}
    <div class="nav">
        <div class="nav_prev">
            {{ if isset .Params "navprev" }}
                {{ $navprev := .Param "navprev" }}
                <a href="{{ $navprev }}">{{ .Param "navprevtext" }}</a>
            {{ else }}
                &nbsp;
            {{ end }}
        </div>
        <div class="nav_up">
            {{ if isset .Params "navup" }}
                {{ $navup := .Param "navup" }}
                <a href="{{ $navup }}">{{ .Param "navuptext" }}</a>
            {{ else }}
                &nbsp;
            {{ end }}
        </div>
        <div class="nav_next">
            {{ if isset .Params "navnext" }}
                {{ $navnext := .Param "navnext" }}
                <a href="{{ $navnext }}">{{ .Param "navnexttext" }}</a>
            {{ else }}
                &nbsp;
            {{ end }}
        </div>
        <div class="clearfix"></div>
    </div>
{{ end }}