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"; // ... and fix the Previous/Next buttons: if (n == 0) { document.getElementById("prevBtn").style.display = "none"; document.getElementById("text-introduce").style.display = "flex"; } else { document.getElementsByClassName("nextBtn").style.display = "inline"; document.getElementById("text-introduce").style.display = "none"; } if (n == (x.length - 1)) { // document.getElementsByClassName("nextBtn").innerHTML = "Recevoir mon guide"; document.getElementsByClassName("nextBtn").style.display = "none"; console.log(n); } else { document.getElementsByClassName("nextBtn").style.display = "initiale"; // document.getElementsByClassName("nextBtn").innerHTML = "Étape suivante"; console.log(n); } // ... and run a function that displays the correct step indicator: fixStepIndicator(n) } function nextPrev(n) { // This function will figure out which tab to display var x = document.getElementsByClassName("tab"); // Exit the function if any field in the current tab is invalid: if (n == 1 && !validateForm()) return false; // Hide the current tab:red 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("regForm").submit(); return false; } // Otherwise, display the correct tab: showTab(currentTab); return n; } function validateForm() { // This function deals with validation of the form fields var x, y, i, valid = true; x = document.getElementsByClassName("tab"); y = x[currentTab].getElementsByTagName("input"); // A loop that checks every input field in the current tab: for (i = 0; i < y.length; i++) { // If a field is empty... if (y[i].value == "") { // add an "invalid" class to the field: y[i].className += " invalid"; // and set the current valid status to false: valid = false; } } // If the valid status is true, mark the step as finished and valid: if (valid) { document.getElementsByClassName("step")[currentTab].className += " finish"; } return valid; // return the valid status } function fixStepIndicator(n) { // This function removes the "active" class of all stepsformControl... var i, x = document.getElementsByClassName("step"); for (i = 1; i < x.length; i++) { x[i].className = x[i].className.replace(" active", ""); } //... and adds the "active" class to the current step: x[n].className += " active"; }