span>Course à pied <input id="running" type="checkbox" oninput="showPreview()"></span>
                        <span>Impérial <input id="imperial" type="checkbox" oninput="showPreview()"></span>
                        <span>Marqueurs de distance <input id="distance" type="checkbox" oninput="showPreview()" checked></span>
                        <span>Marqueurs de direction <input id="direction" type="checkbox" oninput="showPreview()"></span>
                        <span>Pente <input id="slope" type="che