FillRandom.js

function randomIndex(list) {
    return Math.floor(Math.random() * list.length) - 1
}

function triggerUpdate(el) {
    el.click()
    el.dispatchEvent(new Event('change'));
}

function fillRandom() {

    // Click on each second button or something, except previous button and next button
    // Could be improved
    document.querySelectorAll("input:not(#PreviousButton):not(#NextButton)").forEach(function(e, i) {
       if (i % 2 == 0) {
         e.click()
       }
    })

    // Fill in random strings in text fields
    document.querySelectorAll("input[type=text]").forEach(function(e,i) {
      if (e.id.includes("QID170") || e.id.includes("QID58")) {
        return
      }
      e.value = Math.random().toString(36).substring(7);
      triggerUpdate(e)
    })

    // Select random stuff from dropdowns
    document.querySelectorAll("select").forEach(function(e,i) {
        // select random, but skip first one (because that one is empty)
        e.selectedIndex = 1 + randomIndex(e.options)
        triggerUpdate(e)
    })

    // Fill in some stuff that you have to fill in correctly
    try {
       var field = document.querySelector("[id^='QR'][id$='QID170']")
       field.value = 18 + Math.floor(Math.random() * 20)
       triggerUpdate(field)
    } catch(e) {}
    try {
        var field = document.querySelector("[id^='QR'][id$='QID58']")
        field.value = Math.floor(Math.random() * 20)
        triggerUpdate(field)
    } catch(e) {}


    // Click next button
    document.querySelector("#NextButton").click()
}