(function($) {
    $.fn.extend({
        tabify: function() {
            function getHref(el) {
                hash = $(el).find('a').attr('href');
                if (hash)
                    return hash.substring(0, hash.length - 4);
                else
                    return false;
            }
            function setActive(el) {
                $(el).addClass('active');
                if (getHref(el))
                    $(getHref(el)).show();
                else
                    return false;
                $(el).siblings('li').each(function() {
                    $(this).removeClass('active');
                    $(getHref(this)).hide();
                });
            }
            return this.each(function() {
                var self = this;
                var isatleastoneactive = 0;

                $(this).find('li>a').each(function(){
                	$(this).attr('href',$(this).attr('href') + '-tab');
                });

                function handleHash() {
                    if (location.hash)
                        setActive($(self).find('a[href=' + location.hash + ']').parent());
                }
                if (location.hash)
                    handleHash();
                setInterval(handleHash, 100);

                $(this).find('li').each(function() {
                    if ($(this).hasClass('active')) {
                        $(getHref(this)).show();
                        isatleastoneactive += 1;
                    }
                    else
                        $(getHref(this)).hide();
                });

                //if none of the tabs is active, activate the first one
                if (isatleastoneactive == 0) {
                    var el = $(self).find('li:first');
                    setActive(el);
                }
            });
        }
    });
})(jQuery);