function popUp(kuva) {
var address = "img/"+kuva;
var popwindow = window.open('', 'kartta', 'width=448, height=468, resizable=yes, scrollbars=no, toolbar=no, location=no, status=no, menubar=no');
popwindow.document.open();
popwindow.document.write('Kartta
');
popwindow.document.close();
}