package
{
import flash.display.Sprite;
import flash.text.TextField;
import flash.events.FocusEvent;
public class Main extends Sprite
{
public function Main()
{
var tf1:TextField = new TextField();
tf1.type = "input";
tf1.height = 20;
tf1.width = 100;
tf1.border = true;
addChild(tf1);
tf1.addEventListener(FocusEvent.MOUSE_FOCUS_CHANGE, checkFocus);
var tf2:TextField = new TextField();
tf2.type = "input";
tf2.height = 20;
tf2.width = 100;
tf2.border = true;
addChild(tf2);
tf2.x = 200;
}
private function checkFocus(focusEvent:FocusEvent):void
{
if ((focusEvent.target as TextField).text == "")
{
focusEvent.preventDefault();
}
}
}
}