$(document).ready(function () {
            $(window).scroll(function () {
                var s = $(this).scrollTop(),
                    d = $(document).height()-$(window).height(),
                    scrollPercent = 0;
                if($(this).scrollTop()< $('.separator').position().top){
                    scrollPercent = (s / d)*100;
                    $("#progressbar").attr('value', scrollPercent);
                }
                else{
                    scrollPercent = (( $(this).scrollTop() - $('.separator').position().top )/ d)*100;
                    $("#progressbar").attr('value', scrollPercent);
                }
            });
        });