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<!-- Surround the select box within a "custom-select" DIV element.
Remember to set the width: -->
<div class="custom-select" style="width:200px;">
    <option value="0">Select car:</option>
    <option value="1">Audi</option>
    <option value="2">BMW</option>
    <option value="3">Citroen</option>
    <option value="4">Ford</option>
    <option value="5">Honda</option>
    <option value="6">Jaguar</option>
    <option value="7">Land Rover</option>
    <option value="8">Mercedes</option>
    <option value="9">Mini</option>
    <option value="10">Nissan</option>
    <option value="11">Toyota</option>
    <option value="12">Volvo</option>


                /* The container must be positioned relative: */
.custom-select {
  position: relative;
  font-family: Arial;

.custom-select select {
  display: none; /*hide original SELECT element: */

.select-selected {
  background-color: DodgerBlue;

/* Style the arrow inside the select element: */
.select-selected:after {
  position: absolute;
  content: "";
  top: 14px;
  right: 10px;
  width: 0;
  height: 0;
  border: 6px solid transparent;
  border-color: #fff transparent transparent transparent;

/* Point the arrow upwards when the select box is open (active): */ {
  border-color: transparent transparent #fff transparent;
  top: 7px;

/* style the items (options), including the selected item: */
.select-items div,
.select-selected {
  color: #ffffff;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-color: transparent transparent rgba(0, 0, 0, 0.1) transparent;
  cursor: pointer;

/* Style items (options): */
.select-items {
  position: absolute;
  background-color: DodgerBlue;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 99;

/* Hide the items when the select box is closed: */
.select-hide {
  display: none;

.select-items div:hover,
.same-as-selected {
  background-color: rgba(0, 0, 0, 0.1);



                var x, i, j, selElmnt, a, b, c;
/* Look for any elements with the class "custom-select": */
x = document.getElementsByClassName("custom-select");
for (i = 0; i < x.length; i++) {
  selElmnt = x[i].getElementsByTagName("select")[0];
  /* For each element, create a new DIV that will act as the selected item: */
  a = document.createElement("DIV");
  a.setAttribute("class", "select-selected");
  a.innerHTML = selElmnt.options[selElmnt.selectedIndex].innerHTML;
  /* For each element, create a new DIV that will contain the option list: */
  b = document.createElement("DIV");
  b.setAttribute("class", "select-items select-hide");
  for (j = 1; j < selElmnt.length; j++) {
    /* For each option in the original select element,
    create a new DIV that will act as an option item: */
    c = document.createElement("DIV");
    c.innerHTML = selElmnt.options[j].innerHTML;
    c.addEventListener("click", function (e) {
      /* When an item is clicked, update the original select box,
        and the selected item: */
      var y, i, k, s, h;
      s = this.parentNode.parentNode.getElementsByTagName("select")[0];
      h = this.parentNode.previousSibling;
      for (i = 0; i < s.length; i++) {
        if (s.options[i].innerHTML == this.innerHTML) {
          s.selectedIndex = i;
          h.innerHTML = this.innerHTML;
          y = this.parentNode.getElementsByClassName("same-as-selected");
          for (k = 0; k < y.length; k++) {
          this.setAttribute("class", "same-as-selected");
  a.addEventListener("click", function (e) {
    /* When the select box is clicked, close any other select boxes,
    and open/close the current select box: */

function closeAllSelect(elmnt) {
  /* A function that will close all select boxes in the document,
  except the current select box: */
  var x,
    arrNo = [];
  x = document.getElementsByClassName("select-items");
  y = document.getElementsByClassName("select-selected");
  for (i = 0; i < y.length; i++) {
    if (elmnt == y[i]) {
    } else {
  for (i = 0; i < x.length; i++) {
    if (arrNo.indexOf(i)) {

/* If the user clicks anywhere outside the select box,
then close all select boxes: */
document.addEventListener("click", closeAllSelect);