Schovaj pole

<div id="field_obrazokContainer" class="spFormRowOdd">
      <div class="spFormPaymentInfo">
        <input name="field_obrazokPayment" id="field_obrazokPayment" value="" type="checkbox" class="SPPaymentBox" onclick="SP_ActivatePayment( this )" />
        <label for="field_obrazokPayment"> 'Logo' je platené pole. Cena je 5,00 €<br /></label>
        <div style="margin-left:20px;">Kliknite na zaškrtnutie naľavo ak si prajete aktivovať túto možnosť</div>
      </div>
      <div class="spFormRowLeft">
        <label for="field_obrazok">Logo</label>
      </div>
      <div class="spFormRowRight"><input name="field_obrazok" type="file" size="20" accept="image/*" id="field_obrazok" class="spFieldsData" style="width: 350px;" /> </div>
    </div>
    <div id="field_websiteContainer" class="spFormRowEven">
      <div class="spFormRowLeft">
        <label for="field_website">Web stránka</label>
      </div>
      <div class="spFormRowRight"><select name="field_website_protocol" id="field_website_protocol" size="1" class="spFieldsDataProtocol">
   <option selected="selected" value="http">http</option>
   <option value="https">https</option>
</select><span class="spFieldUrlProtocol">://</span><input type="text" name="field_website_url" value="" id="field_website_url" size="350" class="spFieldsData" maxlength="150" style="width: 350px;" /> </div>
    </div>
  </div>

 <script type="text/javascript">
document.getElementById('field_obrazok').onclick = function(){ 
    if (document.getElementById('field_obrazok').checked)
    {
      document.getElementById("field_website").style.display = "block";
    }
    else
    {
     document.getElementById("field_website").style.display = "none";
    }
  }
</script>
       
<style>         
#field_website {display:none;}
</style>

  $(".class_nazov").change(function(){
        if ($(this).is(':checked')) {
         $("#ID_objektu_ktore_sa_objavi").show();         
         } else {
         $("#ID_objektu_ktore_sa_skryje").hide();
        }
    });

<input type="checkbox" class="class_nazov">