Search link construction, combining select?

Question

I am having a small problem with building a search filter for my site.

Anyway, I need a filter that shows options that are related to the previous select example:

jsFiddle:http://jsfiddle.net/u4eb27rb/

var arr_cidades = {
  sp: ["Sorocaba", "Boituva", "Tatuí"],
  rj: ["Uma cidade do Rio", "Outra cidade"]
}

function escolha() {
  var estado = document.querySelector("#estado");
  var cidade = document.querySelector("#cidade");

  cidade.disabled = false;

  cidade.innerHTML = "";

  switch (estado.value) {
    case "sp":
      for (i in arr_cidades.sp) {
        cidade.innerHTML += "<option>" + arr_cidades.sp[i] + "</option>"
      };
      break;
    case "rj":
      for (i in arr_cidades.rj) {
        cidade.innerHTML += "<option>" + arr_cidades.rj[i] + "</option>"
      };
      break;
    default:
      cidade.innerHTML += "<option>- Selecione uma cidade -</option>";
      cidade.disabled = true;
  }
}

<span>Estado</span>
<br>
<select id='estado' onchange="escolha()">
  <option value=''>- Selecione um Estado -</option>
  <option value='sp'>SP</option>
  <option value='rj'>RJ</option>
</select>
<br>
<br>
<span>Cidade</span>
<br>
<select id='cidade' disabled="true">
  <option value=''>- Selecione uma Cidade -</option>
</select>

But I need the access behavior of this link to be as follows:

Codepen: http://codepen.io/anon/pen/zvwGVj

var departamento = document.getElementById('departamento');
var categoria= document.getElementById('categoria');
var montadora= document.getElementById('montadora');
var input = document.getElementById('filtro-j');
input.addEventListener('click', function(e){
    e.preventDefault(); // não precisarias disto se o input fosse <button type="button">Filtrar</button>
    var newLocation  = ['http://www.rs1.com.br', departamento.value, categoria.value, montadora.value].join('/');
  location.href = newLocation;
});

<div class="container">
    <select id="departamento" >
        <option type="text" value="">Selecione o departamento...</option>
        <option type="text" value="automotivo">Automotivo</option>
    </select>
    <select id="categoria" >
        <option type="text" value="">Selecione a categoria...</option>
        <option type="text" value="pastilhas-de-freio">Pastilhas de Freio</option>
    </select>
    <select id="montadora" >
        <option type="text" value="">Selecione a montadora...</option>
        <option type="text" value="?fq=specificationFilter_351:Agrale">Agrale</option>
        <option type="text" value="?fq=specificationFilter_351:Alfa Romeo">Alfa Romeo</option>
        <option type="text" value="?fq=specificationFilter_351:Audi">Audi</option>
        <option type="text" value="?fq=specificationFilter_351:Cadillac">Cadillac</option>
        <option type="text" value="?fq=specificationFilter_351:Chevrolet">Chevrolet</option>
        <option type="text" value="?fq=specificationFilter_351:Chrysler">Chrysler</option>
        <option type="text" value="?fq=specificationFilter_351:Citroën">Citroën</option>
        <option type="text" value="?fq=specificationFilter_351:Daewoo">Daewoo</option>
        <option type="text" value="?fq=specificationFilter_351:Fiat">Fiat</option>
        <option type="text" value="?fq=specificationFilter_351:Ford">Ford</option>
        <option type="text" value="?fq=specificationFilter_351:Gurgel">Gurgel</option>
        <option type="text" value="?fq=specificationFilter_351:Honda">Honda</option>
        <option type="text" value="?fq=specificationFilter_351:Hyundai">Hyundai</option>
        <option type="text" value="?fq=specificationFilter_351:Isuzu">Isuzu</option>
        <option type="text" value="?fq=specificationFilter_351:Iveco">Iveco</option>
        <option type="text" value="?fq=specificationFilter_351:Jac Motors">Jac Motors</option>
        <option type="text" value="?fq=specificationFilter_351:Jeep">Jeep</option>
        <option type="text" value="?fq=specificationFilter_351:Kia Motors">Kia Motors</option>
        <option type="text" value="?fq=specificationFilter_351:Lancia">Lancia</option>
        <option type="text" value="?fq=specificationFilter_351:Land Rover">Land Rover</option>
        <option type="text" value="?fq=specificationFilter_351:Marcopolo">Marcopolo</option>
        <option type="text" value="?fq=specificationFilter_351:Mercedes Benz">Mercedes Benz</option>
        <option type="text" value="?fq=specificationFilter_351:Nissan">Nissan</option>
        <option type="text" value="?fq=specificationFilter_351:Peugeot">Peugeot</option>
        <option type="text" value="?fq=specificationFilter_351:Renault">Renault</option>
        <option type="text" value="?fq=specificationFilter_351:Scania">Scania</option>
        <option type="text" value="?fq=specificationFilter_351:Seat">Seat</option>
        <option type="text" value="?fq=specificationFilter_351:SsangYong">SsangYong</option>
        <option type="text" value="?fq=specificationFilter_351:Subaru">Subaru</option>
        <option type="text" value="?fq=specificationFilter_351:Suzuki">Suzuki</option>
        <option type="text" value="?fq=specificationFilter_351:Toyota">Toyota</option>
        <option type="text" value="?fq=specificationFilter_351:Troller">Troller</option>
        <option type="text" value="?fq=specificationFilter_351:Troller">Volkswagen</option>
    </select>
  <button id="filtro-j" type="button">Filtrar</button>
</div>

In case I select the department "Clothing" The construction of the link if gives the following form example:

Department Category Specification Helmet Clothing Closed Open

The final link in theory would look like this on the filter button:

http://www.rs1.com.br/capacete?fq=specificationFilter_29:Aberto

if the user selected the option Vestuário>Capacete>Aberto

I want to set up a filter that way, the first level that is called clothing is just a visual way of knowing where the user wants to find the items on the site.

I could do that ?

Update: I managed to generate the first level of the link, but the last level could not solve, to compare the second select...

http://codepen.io/anon/pen/pjPWYR?editors=101