// JavaScript Document
//用于内容向上滚动,有停顿
/**startmarquee(一次滚动高度,速度,停留时间,元素ID);**/
function startmarquee(lh, speed, delay, obj) {
    var t;
    var p = false;
    var o = document.getElementById(obj);
    o.innerHTML += o.innerHTML;
    o.onmouseover = function() { p = true }
    o.onmouseout = function() { p = false }
    o.scrollTop = 0;
    function start() {
        t = setInterval(scrolling, speed);
        if (!p) o.scrollTop += 1;
    }
    function scrolling() {
        if (o.scrollTop % lh != 0) {
            o.scrollTop += 1;
            if (o.scrollTop >= o.scrollHeight / 2) o.scrollTop = 0;
        } else {
            clearInterval(t);
            setTimeout(start, delay);
        }
    }
    setTimeout(start, delay);
}
//用于图片无间隙向上滚动
var pcScroll =
{
    "speed": 30,
    "init": function(mid, mid1, mid2) {
        this.moveid = document.getElementById(mid);
        this.moveid1 = document.getElementById(mid1);
        this.moveid2 = document.getElementById(mid2);
        this.moveid2.innerHTML = this.moveid1.innerHTML;
    },
    "marquee": function() {
        if (pcScroll.moveid2.offsetTop - pcScroll.moveid.scrollTop <= 0)//当滚动至demo1与demo2交界时 
            pcScroll.moveid.scrollTop -= pcScroll.moveid1.offsetHeight  //demo跳到最顶端 
        else {
            pcScroll.moveid.scrollTop++
        }
    },
    "startmove": function() {
        var MyMar = setInterval(pcScroll.marquee, 30)
        this.moveid.onmouseover = function() { clearInterval(MyMar) }
        this.moveid.onmouseout = function() { MyMar = setInterval(pcScroll.marquee, 30) }
    }
};