function lunchboxOpen(lunchID) {
document.getElementById('lunch_' + lunchID).style.display = "block";
document.getElementById('clasp_' + lunchID).innerHTML="<a href=\"javascript:lunchboxClose('" + lunchID + "');\">Foto's sluiten</a>";
}
function lunchboxClose(lunchID) {
document.getElementById('lunch_' + lunchID).style.display = "none";
document.getElementById('clasp_' + lunchID).innerHTML="<a href=\"javascript:lunchboxOpen('" + lunchID + "');\">Foto's tonen</a>";
}