(function($) {
    $.fn.expandtext = function(options) {
        var defaults = {
            expandText: "続きを読む >>",
            collapseText: "Ｘ 閉じる",
            collapseTextContainer: "",
            beforeExpand: function($thisEl) {},
            afterExpand: function($thisEl) {},
            onCollapse: function($thisEl) {}
        };

        var options = $.extend(defaults, options);

        return this.each(function() {
            var o = options;

            var expandEle = $(this);
            var collapseEle = null;
            if (o.collapseTextContainer.length == 0) {
                collapseEle = $(this).next(o.collapseTextContainer);
            } else {
                collapseEle = $(this).next();
            }

            if ($(collapseEle).html().length > 0) {
                $(expandEle).append('<span class="iepngfix ExpandText"><a href="#">' + o.expandText + '</a></span>')
                $(collapseEle).append('<span class="iepngfix CollapseText"><a href="#">' + o.collapseText + '</a></span>');
            }

            $('.ExpandText', this).click(function() {
                o.beforeExpand($(this));
                $(expandEle).hide();
                $(collapseEle).show();
                o.afterExpand($(this));
                return false;
            });

            $('.CollapseText', collapseEle).click(function() {
                $(collapseEle).hide();
                $(expandEle).show();
                o.onCollapse($(this));
                return false;
            });
        });
    };
})(jQuery);