获取时间

  function getnowtime() {  
            var nowtime = new Date();  
            var year = nowtime.getFullYear();  
            var month = padleft0(nowtime.getMonth() + 1);  
            var day = padleft0(nowtime.getDate());  
            var hour = padleft0(nowtime.getHours());  
            var minute = padleft0(nowtime.getMinutes());  
            var second = padleft0(nowtime.getSeconds());  
            var millisecond = nowtime.getMilliseconds(); millisecond = millisecond.toString().length == 1 ? "00" + millisecond : millisecond.toString().length == 2 ? "0" + millisecond : millisecond;  
            return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second + "." + millisecond;  
        }  
        //补齐两位数  
        function padleft0(obj) {  
            return obj.toString().replace(/^[0-9]{1}$/, "0" + obj);  
        }