给datebox添加清空按钮

//给datebox添加清空按钮
    $.fn.datebox.defaults.cleanText = ‘清空‘;
    (function ($) {
        var buttons = $.extend([], $.fn.datebox.defaults.buttons);
        buttons.splice(1, 0, {
            text: function (target) {
                return $(target).datebox("options").cleanText
            },
            handler: function (target) {
                $(target).datebox("setValue", "");
                $(target).datebox("hidePanel");
            }
        });
        $.extend($.fn.datebox.defaults, {
            buttons: buttons
        });

    })(jQuery)