<script>
            var area = document.getElementById("articleContent");
            var newList = document.getElementById("newList");
            var newListTemp = document.getElementById("newListTemp");
            var speed = 50;
            area.scrollTop = 0;
            newListTemp.innerHTML = newList.innerHTML;
            
            function scrollUp(){
                if(area.scrollTop >= newList.scrollHeight){
                    area.scrollTop = 0;
                }
                else{
                    area.scrollTop ++;
                }
            }
            var myScroll = setInterval("scrollUp()", speed);
            area.onmouseover = function(){
                clearInterval(myScroll);
            }
            area.onmouseout = function(){
                myScroll = setInterval("scrollUp()", speed);
            }
        </script>
        这段代码放在body的内容下是可以执行的，但是我想放到<style></style>下或者放到js文件中，要怎么改变呢？