js实现将时间戳转换成2017-05-11 15:11:02

function formatDate(now) { 
    var year=now.getYear(); 
    var month=now.getMonth()+1; 
    var date=now.getDate(); 
    var hour=now.getHours(); 
    var minute=now.getMinutes(); 
    var second=now.getSeconds(); 
    return "20"+year+"-"+month+"-"+date+" "+hour+":"+minute+":"+second; 
} 

      
var d=new Date(1508833784588);//时间戳
console.log(formatDate(d));//