Jq公告渐隐弹出

animate弹出后，调用out函数消失。

<!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>豪情</title>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
        <style>
            *{margin:0;padding:0;font-size:12px;}
            input{120px;height:30px;cursor:pointer;}
            #note{position:absolute;400px;padding:20px;background:#eee;border:1px solid #ccc;left:40%;z-index:9999;display:none;}
        </style>
        <script>
        $(function(){
            $('input').click(function(){
                if(!$('#note').is(':visible')){
                    $('#note').css({display:'block', top:'-100px'}).animate({top: '+100'}, 500, function(){
                        setTimeout(out, 3000);
                    });
                }
            });
        });
        function out(){
            $('#note').animate({top:'0'}, 500, function(){
                $(this).css({display:'none', top:'-100px'});
            });
        }
        </script>
    </head>
    <body>
        <div id="note"><a href="http://jikey.cnblogs.com" target="_blank">豪情</a></div>
        <input type="button" value="点我，30s后消失" />
    </body>
</html>