Require Text Input Before Continue & If Statement Malfunctions

programming flash
1

I am really working to get this project completed (it’s an online cognitive psychology experiment), and I’m at the stage now of working out bugs and errors. So, I apologize in advance if I post a lot of questions.

Here’s some context on the project. A participant is shown a word and asked to indicate how many times they’ve seen that word throughout the course of the experiment. Responses are restricted to 0-4. If they respond:
[LIST]
[]2-4, they’re asked whether the background colors were the same or different each time they saw the word, and then they select the color of the various backgrounds
[]1, they select the color of the background
[]0, move on to next item
[]blank, require input before continuing
[/LIST]

I can get the program working correctly if a user responds 1, 2, 3, or 4. The problem is if the response is 0 or blank–the same code fails. If I allow the “0 condition”, below, to execute, it ALWAYS executes, regardless of the value of numberAnswer.

Lastly, I’m at a loss for how to make sure that the user actually enters a value before continuing. I tried if(numberAnswer*=="", but it would not execute that code correctly. I really appreciate any help you all can offer (as always).

Here’s what I have so far:

function executePresentationTest ():void{
    //**Unrelated stuff here removed to make code shorter//
    if(i==90)
        {
            gotoAndStop(8);
        }
    else
        {
            txtMainDisplay.text = "How many times was the below word presented (enter a number 0 - 4)?"
            txtWordDisplay.text = testWord*
            stage.focus = txtInput;
            stage.addEventListener(KeyboardEvent.KEY_DOWN, record_responsepres)
            
        }
    }
    
function record_responsepres(evt:KeyboardEvent):void
    {
        if(evt.keyCode== Keyboard.ENTER)
        {
            txtInput.type=TextFieldType.DYNAMIC;
            txtInput.border=false;
            elapsedTime2=getTimer();
            elapsedTime=elapsedTime2-elapsedTime;
            elapsedTime=getTimer();
            numberAnswer*=int(txtInput.text) 
            stage.removeEventListener(KeyboardEvent.KEY_DOWN,record_responsepres);    
            
            {
            if(numberAnswer*=="4" || numberAnswer*=="2" || numberAnswer*=="3")
                {
                    testQuestion();
                }
            else if (numberAnswer*=="1")
                {
                    pickColors();
                }
            /*else if (numberAnswer*=="0");
                {
                    trace("Executing if 0");
                    blackScreen2();
                }*/
            }
        }
    }