关于文字向左滚动，样式的问题
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js文字向左无缝滚动</title>
</head>
<body>
<style type="text/css">
.qimo8 {
overflow: hidden;
width: 300px;
}
.qimo8 .qimo {
/*width:99999999px;*/
width: 8000%;
height: 30px;
}
.qimo8 .qimo div {
float: left;
}
.qimo8 .qimo ul {
float: left;
height: 30px;
overflow: hidden;
zoom: 1;
}
.qimo8 .qimo ul li {
float: left;
line-height: 30px;
list-style: none;
}
.qimo8 li a {
margin-right: 10px;
color: #444444;
}
</style>
<div id="demo" class="qimo8">
<div class="qimo">
<div id="demo1">
<ul>
<li>
<a href='/office/194/46163.htm'>回收站里的文件删除了怎么恢复</a>
</li>
</ul>
</div>
<div id="demo2"></div>
</div>
</div>
<script type="text/javascript">
var demo = document.getElementById("demo");
var demo1 = document.getElementById("demo1");
var demo2 = document.getElementById("demo2");
demo2.innerHTML = document.getElementById("demo1").innerHTML;
function Marquee() {
if(demo.scrollLeft - demo2.offsetWidth >= 0) {
demo.scrollLeft -= demo1.offsetWidth;
} else {
demo.scrollLeft++;
}
}
var myvar = setInterval(Marquee, 30);
demo.onmouseout = function() {
myvar = setInterval(Marquee, 30);
}
demo.onmouseover = function() {
clearInterval(myvar);
}
</script>
</body>
</html>
</td>
</tr>
</table>这里面
.qimo8 .qimo {
/*width:99999999px;*/
width: 8000%;
height: 30px;
}这个是什么原理啊，求指教
