ActionScript Syntax Error

I'm making a project for my online class, and my script is having errors in 2 lines. I need some help. Can anyone figure out what's wrong with this?

Import Flash.events.Event; Stop();

This.addEventListener (Event.ENTER_FRAME, loading);

Function Loading (e:Event)

    Var total: Number = this.stage.loaderInfo.bytesTotal;

Var loaded: Number = this.stage.loaderInfo.bytesLoaded;

  Loading_bar.scaleX = loaded/total;

Loading_text.text =Math.floor ((loaded/total)*100) + "%";

If (total == loaded) { play ();

    Play():                   

        This.removeEventListener (Event.ENTER_FRAME, loading);

}

}

If you can find the problem, I'll be grateful. And do hurry, I have until tomorrow to post my animation video.