<div id="filter">
<button class="btn active" onclick="filterSelection('all')"><img src="/templates/img/all-icon.svg">Все</button>
<button class="btn" onclick="filterSelection('car')"><img src="/templates/img/trailer-icon.svg">Легковые прицепы</button>
<button class="btn" onclick="filterSelection('boat')"><img src="/templates/img/boat_trailer-icon.svg">Лодочные прицепы</button>
<button class="btn" onclick="filterSelection('optional')"><img src="/templates/img/wheel-icon.svg">Дополнительное оборудование</button>
<button class="btn" onclick="filterSelection('news')"><img src="/templates/img/new-icon.svg">Новинки</button>
<select>
<option>Все</option>
<option>Легковые прицепы</option>
<option>Лодочные прицепы</option>
<option>Дополнительное оборудование</option>
<option>Новинки</option>
</select>
</div>
<div class="catalog">
<div class="filterDiv boat">Легковые</div>
<div class="filterDiv car">Лодочные</div>
<div class="filterDiv optional">Дополнительное</div>
<div class="filterDiv news">Новинки</div>
</div>filterSelection("all")
function filterSelection(c) {
var x, i;
x = document.getElementsByClassName("filterDiv");
if (c == "all") c = "";
// Add the "show" class (display:block) to the filtered elements, and remove the "show" class from the elements that are not selected
for (i = 0; i < x.length; i++) {
w3RemoveClass(x[i], "show");
if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
}
}
// Show filtered elements
function w3AddClass(element, name) {
var i, arr1, arr2;
arr1 = element.className.split(" ");
arr2 = name.split(" ");
for (i = 0; i < arr2.length; i++) {
if (arr1.indexOf(arr2[i]) == -1) {
element.className += " " + arr2[i];
}
}
}
// Hide elements that are not selected
function w3RemoveClass(element, name) {
var i, arr1, arr2;
arr1 = element.className.split(" ");
arr2 = name.split(" ");
for (i = 0; i < arr2.length; i++) {
while (arr1.indexOf(arr2[i]) > -1) {
arr1.splice(arr1.indexOf(arr2[i]), 1);
}
}
element.className = arr1.join(" ");
}
// Add active class to the current control button (highlight it)
var btnContainer = document.getElementById("filter");
var btns = btnContainer.getElementsByClassName("btn");
for (var i = 0; i < btns.length; i++) {
btns[i].addEventListener("click", function() {
var current = document.getElementsByClassName("active");
current[0].className = current[0].className.replace(" active", "");
this.className += " active";
});
}