<ul class="subnavi">
<!--            <li><a href="analysis_tenant_month.php">Mieter pro Monat</a></li> -->
            <li><a href="analysis_apartment_month.php">Wohnung pro Monat</a></li>
            <li><a href="analysis_apartment_year.php">Wohnung pro Jahr</a></li>
          </ul>
        </li>
      </ul>
    </div>
    <div class="inhalt">
    <?php 
include 'inc/dbconnect.inc.php';
include 'inc/php_functions.inc.php';
$costs_diff = 0;
$costs_diff_month = array_fill(1, 12, 0);
$old_house = '';
PrintSelectionBar($db, "analysis_apartment_month.php");
if ($_GET) {
    /*
     * Check $_GET */
    if (!ctype_digit($_GET['year'])) {
        exit('Error: Param');
    } else {
        $get_year = $_GET['year'];
    }
    if (!ctype_digit($_GET['apartment_id'])) {
        exit('Error: Param');
    } else {
        $get_apartment_id = $_GET['apartment_id'];
    }
    /*
     * Grunddaten auslesen */
          <ul class="subnavi">
<!--            <li><a href="analysis_tenant_month.php">Mieter pro Monat</a></li> -->
            <li><a href="analysis_apartment_month.php">Wohnung pro Monat</a></li>
            <li><a href="analysis_apartment_year.php">Wohnung pro Jahr</a></li>
          </ul>
        </li>
      </ul>
    </div>
    <div class="inhalt">
    <?php 
include 'inc/dbconnect.inc.php';
include 'inc/php_functions.inc.php';
$costs_diff = 0;
$costs_diff_month = array_fill(1, 12, 0);
$old_house = '';
PrintSelectionBar($db, "analysis_apartment_year.php");
if ($_GET) {
    /*
     * Check $_GET */
    if (!ctype_digit($_GET['year'])) {
        exit('Error: Param');
    } else {
        $get_year = $_GET['year'];
    }
    if (!ctype_digit($_GET['apartment_id'])) {
        exit('Error: Param');
    } else {
        $get_apartment_id = $_GET['apartment_id'];
    }
    /*
     * Grunddaten auslesen */