function checkReservationForm()
{ ?>
    <div id="checkReservation" class="component col-md-2">
        <div class="panel panel-primary">
            <div class="panel-heading">
                <h2>Zoek beschikbare appartementen</h2>
            </div>
            <div class="panel-body">
                <form action="index.php?action=checkReservation" method="post">
                    <?php if (isset($_GET["error"])) : ?>
                        <p class="error">De begindatum moet kleiner zijn dan de einddatum.</p>
                    <?php endif ?>
                    <div class="form-group">
                        <label for="begindate">begindatum: </label>
                        <input type="date" class="form-control" name="begindate" id="begindate"/>
                    </div>
                    <div class="form-group">
                        <label for="enddate">einddatum: </label>
                        <input type="date" class="form-control" name="enddate" id="enddate"/>
                    </div>
                    <input type="submit" class="btn btn-default" name="check" value="check">
                </form>
            </div>
        </div>
    </div>
<?php }