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w3.css slideshow


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hi there...

i use the dot slideshow indicator with the carousel code for automatic advance images, but can´t make points changes togheter with the image changes with the code... any ideas? 

sorry about my english....


here is the code... thanks in advance.

<header class="w3-display-container w3-center" id="home" style="padding-top: 150px">
  <div class="w3-content w3-display-container" style="max-width:800px">
    <img class="mySlides" src="img-1.jpg" style="width:100%">
    <img class="mySlides" src="img-2.jpg" style="width:100%">
    <img class="mySlides" src="img-3.jpg" style="width:100%">
    <img class="mySlides" src="img-4.jpg" style="width:100%">
    <div class="w3-center w3-container w3-section w3-large w3-text-white w3-display-bottommiddle" style="width:100%">
      <div class="w3-left w3-hover-text-khaki" onclick="plusDivs(-1)">&#10094;</div>
      <div class="w3-right w3-hover-text-khaki" onclick="plusDivs(1)">&#10095;</div>
      <span class="w3-badge demo w3-border w3-transparent w3-hover-white" onclick="currentDiv(1)"></span>
      <span class="w3-badge demo w3-border w3-transparent w3-hover-white" onclick="currentDiv(2)"></span>
      <span class="w3-badge demo w3-border w3-transparent w3-hover-white" onclick="currentDiv(3)"></span>
      <span class="w3-badge demo w3-border w3-transparent w3-hover-white" onclick="currentDiv(4)"></span>

//slideshow carousel
var myIndex = 0;
function carousel() {
    var i;
    var x = document.getElementsByClassName("mySlides");
    for (i = 0; i < x.length; i++) {
      x[i].style.display = "none";  
    if (myIndex > x.length) {myIndex = 1}    
    x[myIndex-1].style.display = "block";  
    setTimeout(carousel, 9000);    
//new code
var slideIndex = 1;

function plusDivs(n) {
  showDivs(slideIndex += n);

function currentDiv(n) {
  showDivs(slideIndex = n);

function showDivs(n) {
  var i;
  var n = document.getElementsByClassName("myIndex");//quitar
  var x = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  if (n > x.length) {slideIndex = 1}    
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
     x[i].style.display = "none";  
  for (i = 0; i < dots.length; i++) {
     dots[i].className = dots[i].className.replace(" w3-white", "");
  x[slideIndex-1].style.display = "block";  
  dots[slideIndex-1].className += " w3-white";


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