var stopscroll = false;
var scrollElem = document.getElementById("andyscroll");
var marqueesHeight = scrollElem.style.height;
scrollElem.onmouseover = new Function('stopscroll = true');
scrollElem.onmouseout = new Function('stopscroll = false');
var preTop = 0;
var currentTop = 0;
var stoptime = 0;
var leftElem = document.getElementById("scrollmessage");
scrollElem.appendChild(leftElem.cloneNode(true));
init_srolltext();
function init_srolltext(){
scrollElem.scrollTop = 0;
setInterval('scrollUp()', 20);}//的面的这个参数25, 是确定滚动速度的, 数值越小, 速度越快
function scrollUp(){
if(stopscroll) return;
currentTop += 1; //设为1, 可以实现间歇式的滚动; 设为2, 则是连续滚动
if(currentTop == 23) {stoptime += 1;currentTop -= 1;
if(stoptime == 120) {currentTop = 0;stoptime = 0;}
}else{preTop = scrollElem.scrollTop;scrollElem.scrollTop += 1;
if(preTop == scrollElem.scrollTop){scrollElem.scrollTop = 0;scrollElem.scrollTop += 1;}}}