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js 走马灯简单实例

2013-11-21 00:00 537 查看 
<!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>
    <title>走马灯</title>
    <script type="text/javascript">

   var direction ='left';
   var intervalId = window.setInterval(function () {
       if (direction == 'right') {
           var title = document.title;
           var firstchar = title.charAt(0);
           var lastchar = title.substring(1, title.length);
           document.title = lastchar + firstchar;
       }
       if (direction == 'left') {
           var title = document.title;
           var firstchar = title.charAt(title.length - 1);
           var lastchar = title.substring(0, title.length - 1);
           document.title = firstchar + lastchar;
       }
   }, 2000)
    </script>
</head>
<body>
</body>
</html>
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