Как реализовать скрытие новостей с определенной категории, если пользователь не хочет данные новости видеть?

<a id="no18" href="#">мне еще нет 18</a><br />
<a id="m18" href="#">мне уже 18+</a>
<style type="text/css">
    #fillBackground {
        display: none;
    }
</style>
<div id="fillBackground">
    текст
</div>
<script type="text/javascript">
    var Cookie = {
        set: function(name, value, expires, path, domain, secure) {
            document.cookie = name + "=" + escape(value) +
                ((expires) ? "; expires=" + expires : "") +
                ((path) ? "; path=" + path : "") +
                ((domain) ? "; domain=" + domain : "") +
                ((secure) ? "; secure" : "");
        },
        get: function(name) {
            var prefix = name + "=";
            var cookieStartIndex = document.cookie.indexOf(prefix);
            if (cookieStartIndex == -1) return null;
            var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length);
            if (cookieEndIndex == -1) cookieEndIndex = document.cookie.length;
            return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex));
        },
        del: function(name, path, domain) {
            if ( this.get( name ) ) {
                document.cookie = name + "=" +
                    ((path) ? "; path=" + path : "") +
                    ((domain) ? "; domain=" + domain : "") +
                    "; expires=Thu, 01-Jan-16 00:00:01 GMT";
            }
        }
    }

    if ( Cookie.get("test") != "1" ) {
        document.getElementById( 'fillBackground' ).style.display = 'block';
    }

    document.getElementById( 'no18' ).onclick = function() {
        Cookie.set("test", "1");
        document.getElementById( 'fillBackground' ).style.display = 'none';
        return false;
    }
    
     
function delete_cookie ( test )
{
  var cookie_date = new Date ( );
  cookie_date.setTime ( cookie_date.getTime() - 1 );
  document.cookie = test += "=; expires=" + cookie_date.toGMTString();
}

    document.getElementById( 'm18' ).onclick = function() {
        delete_cookie ( "test" );
        return false;
    }
</script>