计时器显示

     <p class="act-time">时间：00:00:00</p>

    <script type="text/javascript">  
        var c=0,t; 
        function timedCount()  
        {  
           var temptext=$('.act-time');  
            hour = parseInt(c / 3600);// 小时数  
            min = parseInt(c / 60);// 分钟数  
            if(min >= 60){  
                min = min % 60; 
            }  
            secs = c % 60;
            hour = hour < 10 ? "0" + hour : hour;
            min = min < 10 ? "0" + min : min;
            secs = secs < 10 ? "0" + secs : secs;
            temptext.text('时间：' + hour + ":" + min + ":" + secs);
            c++;  
        }  
        setInterval(timedCount, 1000); //每秒执行一次函数
    </script>