Google Product Forums

Re: Why does W3C shows error on <g:plusone></g:plusone>

Tiger.Huang Jul 8, 2011 5:59 PM
Posted in group: Webmaster Central

Categories: Google +1 button :

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
  <title>Plus1-Testpage</title>
  <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>    
</head>
<body>
        <div class="g-plusone" style="float:left;"></div>
</body>
</html>





   I tested the above code, but when I opened it in IE7, firefox, I can't see the plus one button.