function close_left() {
    var submenu = document.getElementById('submenu');
    var titleline = document.getElementById('titleline');
    var content = document.getElementById('content');
    var submenu = document.getElementById('submenu');
    var submenu_short = document.getElementById('submenu_short');
    var wrapper_message = document.getElementById('wrapper_message');
    var message = document.getElementById('message');
    submenu.style.display='none';
    submenu_short.style.display='block';
    titleline.id = 'titleline_wide';
    content.style.padding='0px 47px 60px 17px';
    if (wrapper_message) {
        wrapper_message.id = 'wrapper_message_fold';
        message.style.width = '807px';
    }
}

function open_left() {
    var submenu = document.getElementById('submenu');
    var titleline_wide = document.getElementById('titleline_wide');
    var content = document.getElementById('content');
    var submenu = document.getElementById('submenu');
    var submenu_short = document.getElementById('submenu_short');
    var wrapper_message_fold = document.getElementById('wrapper_message_fold');
    var message = document.getElementById('message');
    submenu_short.style.display='none';
    submenu.style.display='block';
    titleline_wide.id = 'titleline';
    content.style.padding='0px 47px 60px 210px';
    if (wrapper_message_fold) {
        wrapper_message_fold.id = 'wrapper_message';
        message.style.width = '654px';
    }
}

function close_image(fold_icon, sub01_img_button) {
    var img_area = document.getElementById('img_area');
    img_area.id = 'img_area_fold';
    sub01_img_button.style.margin = '5px 0 0 952px';
    fold_icon.src = fold_icon.src.replace('.gif', '_2.gif');
}

function show_image(fold_icon, sub01_img_button) {
    var img_area = document.getElementById('img_area_fold');
    img_area.id = 'img_area';
    sub01_img_button.style.margin = '62px 0 0 952px';
    fold_icon.src = fold_icon.src.replace('_2.gif', '.gif');
}

function toggle_image() {
    var fold_icon = document.getElementById('fold_icon');
    var sub01_img_button = document.getElementById('sub01_img_button');
    var img_area = document.getElementById('img_area');
    words = fold_icon.src.split('/');
    filename = words[words.length-1];
    if (filename == 'sub01_img_button.gif') {
        close_image(fold_icon, sub01_img_button);
    } else {
        show_image(fold_icon, sub01_img_button);
    }
}