flex 比较时间大小

          function compareTime(str:String):Boolean
          {
            var myPattern1:RegExp=/-|:| /g;
           
      var dateFormatter:DateFormatter = new DateFormatter();
dateFormatter.formatString = "YYYY-MM-DD JJ:NN:SS";
var now:String= dateFormatter.format(new Date());
      str=dateFormatter.format(str);
     
      str=str.replace(myPattern1,'');
     
      now=now.replace(myPattern1,'');
          if(Number(str)<=Number(now))
          {
          Alert.show("系统时间大");
          return true;
          }
          else
          {
          Alert.show("输入的时间大");
          return false;
          }
          }

2: var strs:Number= new Date().valueOf();比较前后时间差
public static function isDelayEnough(lastDate:Date,delayMillisecond:int):Boolean
{
if(new Date().time.valueOf()-lastDate.valueOf()>delayMillisecond)
{
return true;
}
return false;
}