JS- achieve real-time table

    setInterval(function () {
        dobj =new Date();
        year = dobj.getFullYear();
        month = dobj.getMonth()+1;
        month = month>9 ? month :'0'+month;
        day = dobj.getDate();
        day = day>9 ? day :'0'+day;
        hour = dobj.getHours();
        hour = hour>9 ? hour :'0'+hour;
        minute = dobj.getMinutes();
        minute = minute>9 ? minute :'0'+minute;
        sencond = dobj.getSeconds();
        sencond = sencond>9 ? sencond :'0'+sencond;
        str = year+'-'+month+'-'+day+' '+hour+':'+minute+':'+sencond;
        document.title= str;
        time = document.getElementById('time');
        time.innerHTML=str;
        // time.innerText=str;
    },1000);