Get var form Class(Object) by Click (event) in other Class(Main)

programming flash
1

(Sorry, my English is bad)
This is my Class (Object) with a Picture

package 
{ 
    public class NPC extends MovieClip { 
        public var timeOut:Number; 
        public function NPC () {     
            timeOut=Math.random(); 
        } 
    } 
}

This is Main

public function Main()  
{ 
addChild(new NPC ); 
addChild(new NPC ); 
addChild(new NPC ); 
addChild(new NPC ); 
addEventListener(MouseEvent.MOUSE_DOWN, checkTime); 
} 
public function checkTime(e:Event){ 
        //trace(e.target.timeOut); 
    }

I can’t trace timeOut. Help me =_________=[LEFT][COLOR=#FF8000][FONT=monospace]
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