How to ensure a Javascript code for timer with auto-advancing function works only in one block?

My survey has a Quiz section and a questionnaire section. The Quiz section is 1 block with several pages. I wanted to set a timer only in the Quiz block with an auto-advancing function. I followed the steps and Javascript found in a discussion post (https://www.qualtrics.com/community/discussion/7656/how-to-implement-a-time-limit-at-the-block-level-plus-auto-advancing). I inserted the Javascript in the first question of my Quiz block. The timer and auto-advance function work perfectly fine. But the problem is, the Timer count-down continues even after the Quiz block. It means if someone finishes the quiz earlier than the time limit, still the count-down continues to show up in all the following questionnaire blocks. Therefore when the time is up, the page auto-advances during the questionnaire block. To prevent this, I insert a force response feature to most of the questions in my questionnaire block. However, due to some display logic, I cannot put force responses to all the questions. Therefore there is a risk of losing answers in the questionnaire block. The Javascript I used is provided below. I wonder what I should do to make sure that the timer and auto-advance function works only in the Quiz block, not across all the following blocks? I do not have any knowledge of programming. If someone can kindly suggest any solutions that would be a great help! Qualtrics.SurveyEngine.addOnload(function() { var header = document.createElement("div"); header.className = "header" header.id = "header_1"; var timer = document.createElement("div"); timer.className = "timer"; timer.id = "timer_1"; timer.innerHTML = "Time Remaining: <span id='time'>00:10</span>"; header.appendChild(timer); document.body.insertBefore(header, document.body.firstChild); function startTimer(duration, display) { var timer = duration, minutes, seconds; var myTimer = setInterval(function() { Qualtrics.SurveyEngine.setEmbeddedData('timeRemaining', timer); minutes = parseInt(timer / 60, 10) seconds = parseInt(timer % 60, 10); minutes = minutes < 10 ? "0" + minutes : minutes; seconds = seconds < 10 ? "0" + seconds : seconds; var text = ('innerText' in display)? 'innerText' : 'textContent'; display[text] = minutes + ":" + seconds; if (--timer < 0) { clearInterval(myTimer); timeOver(); } }, 1000); } var timerSeconds = parseInt("${e://Field/timeRemaining}"); display = document.querySelector('#time'); startTimer(timerSeconds, display); var timeOver = function() { document.getElementById("timer_1").innerHTML = "Time is up."; $('NextButton').click(); } });