Check text in string AS3.0

Question

So for my Flash class in school I'm making a game, this game has a keypad in it that if you enter the right code it unlocks the door. I have most of it down but am still confused.
So far I have a dynamic text box and when you hit the number buttons I'm using appendText() to add the number to the textbox. There's a clear button that clears the box, and an enter button to enter the code.
buttonEnter.addEventListener(MouseEvent.CLICK,codeCheck);
function codeCheck(e:MouseEvent):void {
          if (KEYPAD_TEXT.text == num1 + num2 + num3 + num4){
                    keypadUnlock = true;
                    trace(keypadUnlock);
          else {
                    KEYPAD_TEXT.text = String("Invalid");
                    trace(keypadUnlock);
Above is the code I am currently using, if I click the enter button right now all it does is tell me the code is invalid wether the code is right or not. This is because I don't know how to check what is actually in the textbox. So if the correct code is 1234 and I enter 1234, how do I make the if statement check wether or not the string says 1234 so that I can set my keypadUnlock to true and unlock the door?
If you need any more information please ask.

Answer 1

use:
kglad wrote:
use:
buttonEnter.addEventListener(MouseEvent.CLICK,codeCheck);
function codeCheck(e:MouseEvent):void {
          if (KEYPAD_TEXT.text == String(num1)+String(num2)+String(num3)+String(num4)){
                    keypadUnlock = true;
                    trace(keypadUnlock);
          else {
                    KEYPAD_TEXT.text = String("Invalid");
                    trace(keypadUnlock);
p.s.  please mark helpful/correct responses.