(function ($) {

	

    $.fn.stickySidebar = function (options) {

        var config = $.extend({

            headerSelector: 'header',

            navSelector: '.content_t',

            contentSelector: '#portal_tab'

        }, options);



        var fixSidebr = function () {

            var sidebarSelector = $(this);

            var headerHeight = $(config.headerSelector).outerHeight();

            var navHeight = $(config.navSelector).outerHeight();

            var contentHeight = $(config.contentSelector).outerHeight();

			var sidebarHeight = sidebarSelector.outerHeight();

            var scroll_top = $(window).scrollTop();

            var breakingPoint1 = headerHeight + navHeight + 8;

            var breakingPoint2 = breakingPoint1 + contentHeight - sidebarHeight;

			

			if ((scroll_top < breakingPoint1) || (scroll_top > breakingPoint2)) {

				sidebarSelector.removeClass('sticky');

			} else {

				sidebarSelector.addClass('sticky');

			} 



        };



        return this.each(function () {

            $(window).on('scroll', $.proxy(fixSidebr, this));

            $(window).on('resize', $.proxy(fixSidebr, this));

            $.proxy(fixSidebr, this)();

        });



    };



}(jQuery));