<!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>无标题文档</title>
</head>
<script type="text/javascript">
var dir = "left";
function setDir()
{
dir = (dir=="left") ? "right" : "left";
document.getElementById( "Mar" ).direction = dir;
}
</script>
</head>
<body>
<marquee id="Mar">欢迎光临！</marquee>
<p><button οnclick="setDir()">改变方向</button></p>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script type="text/javascript">
var dir = "left";
function setDir()
{
dir = (dir=="left") ? "right" : "left";
document.getElementById( "Mar" ).direction = dir;
}
</script>
</head>
<body>
<marquee id="Mar">欢迎光临！</marquee>
<p><button οnclick="setDir()">改变方向</button></p>
</body>
</html>
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