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<!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=gb2312" />
<title>无标题文档</title>
<script>
var str = "这是一个在线拍卖的网站，请尽情血拼吧！";
var seq=0;
function scroll()
{
msg=str.substring(0,seq+1);
banner.innerHTML=msg;
seq++;
if(seq >= str.length) seq =0;
}
</script>
</head>
<body onLoad="setInterval(‘scroll()‘,300)">
<span id="banner"></span>
</body>
</html>
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原文地址：http://www.cnblogs.com/ll-taj/p/5249882.html
