format = (t) =>{
var time = new Date(t);
var y = time.getFullYear();
var m = time.getMonth()+1;
var d = time.getDate();
var h = time.getHours();
var mm = time.getMinutes();
var s = time.getSeconds();
return y+'-'+this.add0(m)+'-'+this.add0(d)+' '+this.add0(h)+':'+this.add0(mm)+':'+this.add0(s);
}
