window.onload = function(){

    var area = document.getElementById('moocBox');

    var con1 = document.getElementById('con1');

    var con2 = document.getElementById('con2');

    var speed = 50;

    area.scrollTop = 0;

    con2.innerHTML = con1.innerHTML;

    function scrollUp(){

        if(area.scrollTop >= con1.scrollHeight) {

            area.scrollTop = 0;

        }else{

            area.scrollTop ++; 

        } 

    }

    var myScroll = setInterval("scrollUp()",speed);

    area.onmouseover = function(){

        clearInterval(myScroll);

    }

    area.onmouseout = function(){

    myScroll = setInterval("scrollUp()",speed);

    }

}