Error Code: 1024 help please??

Okay, here's my code

this.onEnterFrame. omg = function (){}; countdowntimer

  function addEventListener(){}"callback_handler;)"

{

var targetTime = targetTime.getTime();

var timeLeft = targetTime - 670();

var milisecond = Math.floor(timeLeft/100);

var second = Math.floor(second/60);

var decisecond = Math.floor(decisecond/10);

var centisecond = Math.floor(centisecond/10);

second = String(second % 60);

if(second.length < 2){

  second = "0" + second;

}

decisecond = String(decisecond % 10);

if(decisecond.length < 2){

  decisecond = "0" + decisecond;

}

centisecond = String(centisecond % 10);

if(centisecond.length < 2){

  centisecond = "0" + centisecond;

  var counter:String = second + ":" + decisecond + ":" + centisecond;

  time_txt.text = counter;

}else{

  trace("TIME'S }UP");

        var newTime:String = "00:00:00";

        time_txt.text = newTime;

        delete (this.onEnterFrame);

}

}

I'm trying to create a customized countdown timer, and you'll notice on line 4, collumn 11, I keep getting the same error no matter how I change it...

Can anyone tell me what is wrong??