How do I disable / enable sections of my website with PHP + Checkboxes?

I need help with enableing/disableing parts of my website.

    <p>Disabled Sections:</p>
    <form id="e-d-check" method="post">
        <input type="checkbox" name="SRS" onchange="document.getElementById('e-d-check').submit()">SkiRegionSimulator 2012</input>
        <input type="checkbox" name="Bilder" onchange="document.getElementById('e-d-check').submit()">Bilder</input>
        <input type="checkbox" name="KWS" onchange="document.getElementById('e-d-check').submit()">Klimawandel-Stunde</input>
    </form>

        <table>
            <tr>
                <th>Name</th>
                <th>Größe</th>
                <th>Datum</th>
                <th>Download</th>
            </tr>

            <?php 
                if (isset($_POST['SRS'])) {
                    echo 'Disabled SkiRegionSimulator 2012';
                } else {
                    include'SRS.php';
                }
            ?>

Everytime I uncheck the box it checks itself again...