Flash / Flex / ActionScript/Statement/throw

Rethrowing Exceptions

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        try
        {
            try
            {
                throw new Error();
            } catch (error:Error) {
                trace("inner handler");
                throw error;
            }
        } catch (error:Error) {
            trace("outer handler");
        }
    }
  }
}

throw Error in a function

 
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var sUsername:String = tUsername.text; 
        
        try {
          checkUsername(sUsername);
        }
        catch (erObject:Error) {
          trace("An error was thrown.");
        }
    }
    function checkUsername(sUsernameParam:String) {
      if(sUsernameParam == "") {
        throw new Error();
      }
    } 
  }
}