AS3 Parameters

Hi everyone,

I’m trying to send a dynamic textbox instance name as a parameter, so I can use it in a function.

e.g.

btn_play.addEventListener(MouseEvent.MOUSE_DOWN, playVideo);

function playVideo(event.MouseEvent):void{
updateText(txt_inputbox);
}

function updateText(textboxName:string):void{
textboxName.text = “Hello World”
}

Is this actually possible if so what parameter type do I set textboxName as?
I cannot use the event.currentTarget as the function is called after clicking on a different button.

Any help would be much appreciated.
Thanks in advance.