text: //progressive form code from https://www.w3schools.com/howto/howto_js_form_steps.asp
  
  
  //maak alle tabs standaard niet zichtbaar
  var tabs = document.querySelectorAll(".choice .tab");
  console.log(tabs);
  for(let i = 0; i < tabs.length; i++){
    tabs[i].style.display = 'none';
  }
  
  var nextButton = document.querySelector('button');
  nextButton.type = 'button';
  var currentTab = 0; // Current tab is set to be the first tab (0)
  showTab(currentTab); // Display the current tab
  
  function showTab(n) {
    // This function will display the specified tab of the form ...
    var x = document.getElementsByClassName("tab");
    x[n].style.display = "flex";
  }
  
  function nextPrev(n) {
    // This function will figure out which tab to display
    var x = document.getElementsByClassName("tab");
  
    // Hide the current tab:
    x[currentTab].style.display = "none";
    // Increase or decrease the current tab by 1:
    currentTab = currentTab + n;
    // if you have reached the end of the form... :
    if (currentTab >= x.length) {
      //...the form gets submitted:
      document.getElementById("carForm").submit();
      return false;
    }
    // Otherwise, display the correct tab:
    showTab(currentTab);
  }
  