JavaScript Form Kontrolü Yardım

<form class="form-horizontal" name="nobetformu"> 
  <fieldset> 
   
  <!-- Form Name --> 
  <legend>Nöbet Ücreti Hesaplama</legend> 
   
  <!-- Select Basic --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="Yıl">Yıl</label> 
    <div class="col-md-4"> 
      <select id="Yıl" name="Yıl" class="form-control"> 
        <option value="1">2016 Ocak</option> 
        <option value="2">2016 Temmuz</option> 
      </select> 
    </div> 
  </div> 
   
  <!-- Select Basic --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="unvan">Unvanı</label> 
    <div class="col-md-4"> 
      <select id="unvan" name="unvan" class="form-control"> 
        <option value="uzman" name="unvan">Uzman Tabip</option> 
        <option value="2">Pratisyen Tabip</option> 
        <option value="3">Diş Tabibi ve Eczacı</option> 
        <option value="4">Sağlık Personeli Y.Ö</option> 
        <option value="5">Sağlık Personeli Lise</option> 
        <option value="6">Diğer Personeller</option> 
      </select> 
    </div> 
  </div> 
   
  <!-- Prepended checkbox --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="normalnobet">Normal Nöbet</label> 
    <div class="col-md-4"> 
      <div class="input-group"> 
        <span class="input-group-addon">      
            <input type="checkbox" checked="checked">      
        </span> 
        <input id="normalnobet" name="normalnobet" class="form-control" type="text" onKeyUp="SayisalDeger(this);" placeholder="Nöbet Süresi"> 
      </div> 
       
    </div> 
  </div> 
   
  <!-- Prepended checkbox --> 
  <div class="form-group"> 
    Ameliyathane Diyaliz Yoğun Bakım Acil Servis 112 vb. 
    <div class="col-md-4"> 
      <div class="input-group"> 
        <span class="input-group-addon">      
            <input type="checkbox">      
        </span> 
        <input id="acilnobet" name="acilnobet" class="form-control" type="text" onKeyUp="SayisalDeger(this);" placeholder="Nöbet Süresi"> 
      </div> 
       
    </div> 
  </div> 
   
  <!-- Prepended checkbox --> 
  <div class="form-group"> 
    Dini Bayram Ameliyathane Diyaliz Acil 112 vb. 
    <div class="col-md-4"> 
      <div class="input-group"> 
        <span class="input-group-addon">      
            <input type="checkbox">      
        </span> 
        <input id="diniacil" name="diniacil" class="form-control" type="text" onKeyUp="SayisalDeger(this);" placeholder="Nöbet Süresi"> 
      </div> 
       
    </div> 
  </div> 
   
  <!-- Prepended checkbox --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="dininormal">Dini Bayram Normal Nöbet</label> 
    <div class="col-md-4"> 
      <div class="input-group"> 
        <span class="input-group-addon">      
            <input type="checkbox">      
        </span> 
        <input id="dininormal" name="dininormal" class="form-control" type="text" onKeyUp="SayisalDeger(this);" placeholder="Nöbet Süresi"> 
      </div> 
       
    </div> 
  </div> 
   
  <!-- Textarea --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="sonuc">Hesaplama Sonucu</label> 
    <div class="col-md-4">                      
     <input type="text" name="islemsonucu" size="30"> 
    </div> 
  </div> 
   
  <!-- Button (Double) --> 
  <div class="form-group"> 
    <label class="col-md-4 control-label" for="hesapla"></label> 
    <div class="col-md-8"> 
      <button id="hesapla" name="hesapla" onClick="Hesapla()" class="btn btn-success">Hesapla</button> 
      <button id="reset" name="reset" class="btn btn-danger">Temizle</button> 
    </div> 
  </div> 
   
  </fieldset> 
  </form>