Populating additional text entry fields upon hitting "enter"

Thanks - I've played around with some JS and achieved my desired functionality, however, the entries are not saving consistently across blocks. I am using the below code across 14 blocks, and in one instance blocks 3 & 7 may be blank, while the next instance blocks 3&7 are population but 2&6 are not, for example.

Any thoughts on ways to improve the way the entries are being saved?

Qualtrics.SurveyEngine.addOnload(function()
{
/*Place your JavaScript here to run when the page loads*/

});

Qualtrics.SurveyEngine.addOnReady(function()
{
// disables the next button so the user cant click it yet
var nextBtn = document.getElementById("NextButton");
nextBtn.disabled = true;

// array to store answers
var answers = new Array();
// input box handler
var txtBox = "";
// countdown timer value
var timer = 10;


// function that finds and sets the correct ID of current text box
function getID() {
var inputs = document.getElementsByTagName("input");

var regEx = new RegExp("QR~QID");

for (var i=0; i<inputs.length ; i++) {
if (regEx.test(inputs[i].id))
txtBox = inputs[i];
}
}

// call function to get text box ID before we use it
getID();

// save input box contents to answers array and clear the field after
function saveAnswer() {
answers.push(txtBox.value);
txtBox.value = "";
clearInterval(timer);
}

// function to slow execution of code by milliseconds
function sleep(time) {
var currentTime = new Date().getTime();

while (currentTime + time >= new Date().getTime()) {
}
}

// add event listener to call function saveAnswer when enter key is pressed
txtBox.addEventListener('keyup', function(e) {
if (e.keyCode == 13) {
saveAnswer();
}

});

if (!document.getElementById("info"))
alert('not found');

// set the time we count down to which is multiplied by 1000 to equal seconds
var countDownDate1 = new Date().getTime()+(timer*1000);

// Update the count down every 1 second
var x = setInterval(function() {

// Get today's date and time
var now = new Date().getTime();

// Find the distance between now and the count down date
distance = countDownDate1 - now;

var seconds = Math.floor((distance % (1000 * 60)) / 1000);

// Output the result in an element with id="demo"
document.getElementById("info").innerHTML = seconds + "s ";

// If the count down is over, write some text
if (distance < 0) {
txtBox.style.display = 'none';
txtBox.value = answers;

sleep(1000);

clearInterval(x);
//document.getElementById("demo").innerHTML = "EXPIRED";
nextBtn.disabled = false;

nextBtn.click();
}
}, 1000);


startCount();
});

Qualtrics.SurveyEngine.addOnUnload(function()
{
/*Place your JavaScript here to run when the page is unloaded*/

});

I attempted to resolve this using display logic within the choice selection, however, since the "in page" option does not work for choices, the additional fields still do not appear

Thank you so much, can that be achieved through the display logic? I'm still struggling to find where to define the logic you mentioned.