Model.prototype.transDate = function(row) {//计算帖子发布时间
var datetime="";
var start=row.val('date');
var end=new Date();
var min;
var hour;
var day;
datetime=justep.Date.diff(start, end, 'n');
var i = datetime*1;
if (i<60){
datetime=datetime+"分前";
}else{
if (i<60*24){
hour= Math.floor(i/60);
min=i%60;
datetime=hour+"时"+min+"分前";