Preloader JS

// PRELOADER
    var width = 100,
        perfData = window.performance.timing, // The PerformanceTiming interface represents timing-related performance information for the given page.
        EstimatedTime = -(perfData.loadEventEnd - perfData.navigationStart),
        time = parseInt((EstimatedTime / 1000) % 60, 10) * 100;

    var PercentageID = $("#percentage"),
        start = 0,
        end = 100,
        durataion = time;
    animateValue(PercentageID, start, end, durataion);

    function animateValue(id, start, end, duration) {

        var range = end - start,
            current = start,
            increment = end > start ? 1 : -1,
            stepTime = Math.abs(Math.floor(duration / range)),
            obj = $(id);

        var timer = setInterval(function() {
            current += increment;
            $(obj).text(current);
            //obj.innerHTML = current;
            if (current == end) {
                clearInterval(timer);
            }
        }, stepTime);
    }