function showboxOpen(showID) {
document.getElementById('show_' + showID).style.display = "block";
document.getElementById('clasp_' + showID).innerHTML="<a href=\"javascript:showboxClose('" + showID + "');\">Airports</a>";
}
function showboxClose(showID) {
document.getElementById('show_' + showID).style.display = "none";
document.getElementById('clasp_' + showID).innerHTML="<a href=\"javascript:showboxOpen('" + showID + "');\">Airports</a>";
}