31_Js根据13位时间戳转yyyy-MM-dd字符串

Js根据13位时间戳转yyyy-MM-dd字符串:

function dateLong2String(time){
       var date = new Date(time);
       var year = date.getFullYear();
       var month = date.getMonth()+1;
       var day = date.getDate();
       month = month < 10 ? "0"+month:month;
       day = day < 10 ? "0"+day:day;
       return year+"-"+month+"-"+day;
};