问强制jQuery滚动条脚本无缝循环

EN

function marquee(a, b) {
    var width = b.width();
    var start_pos = a.width();
    var end_pos = -width;

    function scroll() {
        if (b.position().left <= -width) {
            b.css('left', start_pos);
            scroll();
        }
        else {
            time = (parseInt(b.position().left, 10) - end_pos) *
                (10000 / (start_pos - end_pos)); // Increase or decrease speed by changing value 10000
            b.animate({
                'left': -width
            }, time, 'linear', function() {
                scroll();
            });
        }
    }

    b.css({
        'width': width,
        'left': start_pos
    });
    scroll(a, b);

    b.mouseenter(function() {     // Remove these lines
        b.stop();                 //
        b.clearQueue();           // if you don't want
    });                           //
    b.mouseleave(function() {     // marquee to pause
        scroll(a, b);             //
    });                           // on mouse over

}

$(document).ready(function() {
    marquee($('#band'), $('#band-content'));  //Enter name of container element & marquee element
});