// JavaScript Document

var speeda = 20;
china7x2.innerHTML = china7x1.innerHTML       //克隆demo1为demo2  
function Marqueea() {
    if (china7x2.offsetWidth - china7x.scrollLeft <= 0)         //当滚动至demo1与demo2交界时  
        china7x.scrollLeft -= china7x1.offsetWidth         //demo跳到最顶端  
    else {
        china7x.scrollLeft++       //如果是横向的 将 所有的 height top 改成 width left  
    }
}
var MyMara = setInterval(Marqueea, speeda)        //设置定时器  
china7x.onmouseover = function() {
    clearInterval(MyMara)
}
china7x.onmouseout = function() { MyMara = setInterval(Marqueea, speeda) }