as3 non mouse event function

Hello,
i have a password game where users need to select the correct 3 buttons to progress to the next stage. The 3 buttons that need to be selected are: pwd_btn1, pwd_btn2,pwd_btn3. After, the user must click on “submit_btn” to verify if they have chosen the correct buttons.
So far everything works fine.
So what i would like to happen is that once the 3 buttons are selected, and before the submit_btn is clicked, a function is triggered that will apply a glow effect to the submit_btn, indicating to the user to click on it. I know i have to make a function that is not a non mouse event but i don’t know how.
Any help would be greatly appreciated, thanks

submit_btn.addEventListener(MouseEvent.CLICK,verify_pw);

failed_txt.border = false;
var myName:String;
var myPass:String;

function verify_pw(eventMouseEvent):void{
myName = name_txt.text;
myPass = pass_txt.text;
if(myName == “user1” && myPass == “pwd_btn1pwd_btn2pwd_btn3”){
gotoAndPlay(“hidden”);
}
}