[Jegor UQ]

var lis:Object = new Object ({focus:false});
//
//***************************************************
//
for (var i:Number = new Number (); i < 3; i++)
{
	createTextField ("field" + i, getNextHighestDepth (), 10, 20 * i, 300, 20);
	with (eval ("field" + i))
	{
		border = true;
		type = "input";
	}
}
createTextField ("field_result", getNextHighestDepth (), 10, 100, 300, 20);
with (field_result)
{
	border = true;
	text = "please, fill the textFields and press ENTER";
}
//
//***************************************************
//
function sendinfo ()
{
	//
	//***************************************************
	//
	field_result.text = field0.text + " " + field1.text + " " + field2.text;
	// отправить
	//***************************************************
	//
}
for (i = 0; i < 3; i++)
{
	eval ("field" + i).onSetFocus = eval ("field" + i).onKillFocus = function ()
	{
		lis.focus = !lis.focus;
	};
}
lis.onKeyDown = function ()
{
	if (Key.getCode () == Key.ENTER && lis.focus)
	{
		sendinfo ();
	}
};
Key.addListener (lis);

Работает... так? Или я опять что-то недопонял...