anchor.diff:      
   
       <%@include file="WEB-INF/jspf/footer.jspf" %>
  -
  -    
  -         
  +    <script>
  +    function myFunction() {
  +        var x = document.getElementById("selectPeriodo").value;
  +        document.getElementById("demo").innerHTML = "Período("+x+")";
  +    }
       </script>
   
       </body>
  
positive.code:                 </div>
                  <div class="form-group  col-3">
                              <label for="selectPeriodo">Período da Taxa</label>
                              <select id="selectPeriodo" class="form-control" id="exampleSelect1">
                                  <option>Mensal</option>
                                  <option>Anual</option>
                              </select>
  
negative.code:              <table class="table table-hover" style="border-color:red;">
                   <thead>
                  <tr>
                      <th id="demo">Período(meses)</th>
                      <th>Prestação</th>
                      <th>Juros</th>
                      <th>Amortização</th>
  