dropdown hide snd show button

by Joe

HTML

<div class="form-group col-4" style="margin-bottom: 0px;">
  <label class="col-sm-12 control-label p-sm-0">Bill type :</label>
  <select class="form-control selectsch_items" name="cashbill" id="cashbill" required>
    <option value="">Choose an items</option>
    <option value="1">Raw</option>
    <option value="2">Spare</option>
    <option value="3">Others</option>
  </select>
</div>

<div class="form-group cash-billbtn">
  <label class="col-sm-12 control-label p-sm-0"></label>
  <button type="button" class="bill-btn" id="bill_icon">Bill</button>
</div>

JavaScript

$(function() {
  $('#cashbill').change(function() {
    $('#bill_icon').hide();
    $('#bill_icon' + $(this).val()).show();
  });
});