ActionScript 3

// The purpose of this Flash movie is to show that even though textField2 is
// created with ActionScript, it can be accessed from inside a function.  The 
// text box's scope is such that a function can access it.  This is fortunate,
// since it's a lot harder in AS3 to create global variables than it was in AS2.

// EXAMPLE 1 USES A TEXT FIELD PLACED ON THE STAGE:
myButton1_btn.addEventListener(MouseEvent.CLICK, updateTextField1);

function updateTextField1(myEvent:MouseEvent)
{  
	textField1.text = "Button 1 was clicked";
}

// EXAMPLE 2 USES A TEXT FIELD CODED WITH ACTION SCRIPT:
var textField2:TextField = new TextField();
textField2.border = true;
textField2.width = 150;
textField2.height = 30;
textField2.x = 30;
textField2.y = 85;
addChild(textField2);

myButton2_btn.addEventListener(MouseEvent.CLICK, updateTextField2);

function updateTextField2(myEvent:MouseEvent)
{	
	textField2.text = "Button 2 was clicked";
}