Html 页面底部添加版权信息

<!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>
        <style type="text/css">
            body {
                padding: ;
                margin:  auto;
            }

            #footer {
                height: 40px;
                line-height: 40px;
                position: fixed;
                bottom: ;
                width: %;
                text-align: center;
                background: #;
                color: #fff;
                font-family: Arial;
                font-size: 12px;
                letter-spacing: 1px;
            }

            .content {
                height: 1800px;
                width: %;
                text-align: center;
            }
        </style>
    </head>
    <body>
        <!--
            作者：zxu
            时间：--
            描述：页面添加版权信息
        -->
       <div id="footer">CopyRight@copy2012 </div>
    </body>
</html>