// JavaScript Document
//获取外框
var area = document.getElementById("mooc");
//获取con1
var con1 = document.getElementById("mooc1");
//获取con2
var con2=document.getElementById("mooc2");
//con2克隆con1
con2.innerHTML=con1.innerHTML;
//设置滚动的初始值为0
area.scrollTop=0;
//创建向上滚动的函数
function scrollUp(){
area.scrollTop++;
//判断
if(area.scrollTop >= con1.offsetHeight){
area.scrollTop = 0;
}else{
area.scrollTop++;
}
}
//将滑动的速度保存为一个变量
var speed = 200;
//使用定时器，速度为50
var myScroll = setInterval("scrollUp()",speed);
//鼠标移入清除定时器
area.onmouseover = function(){
clearInterval(myScroll);
}
//鼠标移出，添加定时器
area.onmouseout = function(){
myScroll = setInterval("scrollUp()",speed);
}