Jquery 操作Cookie

<script src="jquery.js" type="text/javascript"></script>
    <script src="jquery.cookie.js" type="text/javascript"></script>
    <script language="javascript" type="text/javascript">
        function setcookie()
        {
            var dt=new Date();
            dt.setTime(dt.getTime()+1*60*1000);// 设置cookie到期时间为1分钟
            $.cookie('username','ni mei',{path:'/',expires:dt});//username为cookie的名字  ni mei 为值 dt为时间 path为路径
        }
       
        function getcookie()
        {
            alert( $.cookie('username'));//获取cookie名字为username的值
        }
       
        function cleancookie()
        {
            $.cookie('username',null);//删除名字为username的cookie
        }
    </script>