function setItem( id ){
    var image = "btn_matome_on";
    var manager = new CookieManager();
    var item_list_string = manager.getCookie("ITEM_LIST_INQUIRE_CHK");
    var item_list = [];
    if ( item_list_string ) {
        item_list = item_list_string.split(",");
    }

    if ( item_list.indexOf( id ) != -1 ) {
        item_list = item_list.without( id );
        image = "btn_matome_off";
    } else {
        item_list.push( id );
        image = "btn_matome_on";
    }

    var tags = "item_cookie_" + id;
    document.images[tags].src = "/images/" + image + ".gif";

    var result = item_list.uniq();
    manager.clearCookie("ITEM_LIST_INQUIRE_CHK");
    manager.setCookie("ITEM_LIST_INQUIRE_CHK", result.join(","));
}