Browser back/next button to navigate between tabs

I'm getting lot of complaints from the users that when they're using my jQuery based tabs, they find it annoying that when they hit back on their browser, they dont go to the previous tab but to the previous page. I added the following previous/next buttons but not enough. How can I reconfigure my buttons so that users would go to the previous tab rather than previous page, when they click the browser back arrow. You can test it here.

        $('#quicktabs-registration_steps').append('<div class="prevnext"><a class="tablink-prev btn" href="#">Prev</a><a class="tablink-next btn btn-lg btn-primary" href="#">Continue</a></div>');
        $('.tablink-prev').click(function(){
            var index = $('.quicktabs-tabs li.active').index();
            $('.quicktabs-tabs li').eq(index).removeClass('active');
            if (index == 0) {
            index = 1;
        }
        $('.quicktabs-tabs li').eq(index - 1).addClass('active');
        $('.quicktabs-tabs li').eq(index - 1).find('a').click();
            return false;
        });
        $('.tablink-next').click(function(){
            var length = $('.quicktabs-tabs').first().children().size();;
            var index = $('.quicktabs-tabs li.active').index();
            $('.quicktabs-tabs li').eq(index).removeClass('active');
//                if (parseInt(index) == parseInt(length) - 1 ) {
//                    index = index - 1;
//                }
                if (parseInt(index) == parseInt(length) - 1 ) {
                    window.location.href = '/home'; //redirect to home
                    //index = index - 1;
                }
            $('.quicktabs-tabs li').eq(index + 1).addClass('active');
            $('.quicktabs-tabs li').eq(index + 1).find('a').click();
            return false;
        });

from Browser back/next button to navigate between tabs