DIV 自动滚动功能及滚动条颜色修改的代码

<script type="text/javascript">
function startmarquee(lh, speed, delay) {
var t;
var oHeight = 300; /** div的高度 **/
var p = false;
var o = document.getElementById("show");
var preTop = 0;
o.scrollTop = 0;
function start() {
t = setInterval(scrolling, speed);
o.scrollTop += 1;
}
function scrolling() {
if (o.scrollTop % lh != 0
&& o.scrollTop % (o.scrollHeight - oHeight - 1) != 0) {
preTop = o.scrollTop;
o.scrollTop += 1;
if (preTop >= o.scrollHeight || preTop == o.scrollTop) {
o.scrollTop = 0;
}
} else {
clearInterval(t);
setTimeout(start, delay);
}
}
setTimeout(start, delay);
}
window.onload = function () {
/**startmarquee(一次滚动高度,速度,停留时间);**/
startmarquee(20, 40, 50);
} 
</script>
 <div id="show" style="height: 600px; width: 100%; overflow-y: scroll;scrollbar-base-color:#ffffff;SCROLLBAR-HIGHLIGHT-COLOR:#ffffff;SCROLLBAR-ARROW-COLOR:#ffffff; overflow-x: none;"></div>

scrollbar-3d-light-color 设置或检索滚动条亮边框颜色 
crollbar-highlight-color 设置或检索滚动条3D界面的亮边（ThreedHighlight）颜色
scrollbar-face-color 设置或检索滚动条3D表面（ThreedFace）的颜色 
scrollbar-arrow-color 设置或检索滚动条方向箭头的颜色
scrollbar-shadow-color 设置或检索滚动条3D界面的暗边（ThreedShadow）颜色 
scrollbar-dark-shadow-color 设置或检索滚动条暗边框（ThreedDarkShadow）颜色 
scrollbar-base-color 设置或检索滚动条基准颜色。