function close_photo() {
    //div = document.getElementById('gallery_large_photo');
}

function open_photo(elm, photoID) {
    //contents = document.getElementById('gallery_main_image');

    params = 'mod=content';
    //params += '&page=gallery_popup';
    params += '&function=ajax_image';
    params += '&image_ID='+photoID;
    //contents.innerHTML = '';

    new Ajax.Updater('gallery_main_image', '/ajax.php', {method: 'get', parameters: params, onFailure: reportError});
}

function reportError(request) {
    alert(request);
}