function gundong(v,speed) {
    function Marquee(demo, demo1, demo2) {
        var scl = demo.scrollLeft;
        if (demo2.offsetWidth - demo.scrollLeft <= 0)
            demo.scrollLeft -= demo1.offsetWidth
        else {
            demo.scrollLeft++;
            if (scl == demo.scrollLeft) {
                demo.scrollLeft = 0;
            }
        
         }
    }
    if (speed == null||parseInt(speed)==NaN)
        speed = 15;
    var speed3 = speed; //速度数值越大速度越慢
    var demo = document.getElementById(v);
    var demo1 = document.getElementById(v + "_1");
    var demo2 = document.getElementById(v + "_2");

    demo2.innerHTML = demo1.innerHTML;
    //var MyMar=setInterval(Marquee(demo,demo1,demo2),speed3)

    var MyMar = setInterval(function () { Marquee(demo, demo1, demo2); }, speed3)

    demo.onmouseover = function () { clearInterval(MyMar) }
    demo.onmouseout = function () { MyMar = setInterval(function () { Marquee(demo, demo1, demo2); }, speed3) }
}