选择框时选择Javascript更改值

Question

<center>
<div class="main">
  <div class="harga">Rp.2,680,000 / Bln</div>
  <div class="other">Kontrak Setahun
  atau <label>Rp. 2,930,000 / Bln</label></div>
  </br>
  <div class="traffic">Pilih traffic Anda dibawah ini</div>
  <select class="visitor">
    <option value="5,000">Up To 5,000</option>
    <option value="7,900">Up To 7,900</option>
    <option value="17,600">Up To 17,600</option>
    <option value="25,000">Up To 25,000</option>
  </select>
  </br>
  Visitor / Bulan
</div>
</center>

<script type="text/javascript">
  $(function() {
    if((".visitor").val() == "5,000") {
      $(".harga").value == "4000";
    }
  });
</script>

i have this script, how can I change the value on harga from visitor , when I choose selection from select box?

thank you before.

Answer 1

Use change event like this

$('.visitor').change(function(){
        if($(this).val()  == '5,000'){
                // write your to do action here
        }
});