var active_cover_group = '';
var active_photobook_type = 5;
var photobook_type_default_cover_groups = new Array();

function changeCoverGroup(cover_group){
    if(active_cover_group.length>0){
        $(active_cover_group + '_cover_group').removeClassName("active");
        $(active_cover_group + '_cover_group_contents').style.display = 'none';
    }
    active_cover_group = cover_group;
    $(active_cover_group + '_cover_group').addClassName("active");
    $(active_cover_group + '_cover_group_contents').style.display = 'block';
}

function changePhotobookType(photobook_type){
    $('book_type_' + active_photobook_type + '_main_contents').style.display = 'none';
    $('book_type_' + active_photobook_type + '_right_column_contents').style.display = 'none';
    $('book_type_' + active_photobook_type).removeClassName("active");
    active_photobook_type = photobook_type;
    $('book_type_' + active_photobook_type + '_main_contents').style.display = 'block';
    $('book_type_' + active_photobook_type + '_right_column_contents').style.display = 'block';
    $('book_type_' + active_photobook_type).addClassName("active");
    photobook_type_default_cover_groups.each(function setDefault(obj){
        if(obj[0]==active_photobook_type){
            changeCoverGroup(obj[1]);
        }
    });
}