function startUpload(){
      document.getElementById('f1_upload_process').style.visibility = 'visible';
      document.getElementById('f1_upload_form').style.visibility = 'hidden';
      return true;
}

function stopUpload(success){
      var result = '';
      if (success == 1){
         result = '<span class="msg">Soubor byl úspěšně nahrán! The file was succesfully uploaded!<\/span><br/><br/>';
      }
      else {
         result = '<span class="emsg">Při nahrávání souboru nastala chyba! Zkontrolujte správnost formátu souboru.<br/>There was an error when uploading the file! Please check if the file format is right.<\/span><br/><br/>';
      }
      document.getElementById('f1_upload_process').style.visibility = 'hidden';
      document.getElementById('f1_upload_form').innerHTML = result + '<label for="myfile">Soubor - File:</label><input id="myfile" name="myfile" tabindex="1" type="file" size="30" /><input type="submit" name="submitBtn" tabindex="2" class="sbtn" value="Upload" />';
                    
      
      document.getElementById('f1_upload_form').style.visibility = 'visible';      
      return true;   
}
function stopVideoUpload(success){
      var result = '';
      if (success == 1){
         result = '<span class="msg">Video bylo úspěšně přiřazeno! The video was succesfully saved!<\/span><br/><br/>';
      }
      else {
         result = '<span class="emsg">Při nahrávání souboru nastala chyba! <br/>There was an error when uploading the file! <\/span><br/><br/>';
      }
      document.getElementById('video_upload_process').style.visibility = 'hidden';
      document.getElementById('video_upload_form').innerHTML = result;
                    
      
      document.getElementById('video_upload_form').style.visibility = 'visible';      
      return true;   
}
function startVideoUpload(){
  document.getElementById('video_upload_process').style.visibility = 'visible';
  document.getElementById('video_upload_form').style.visibility = 'hidden';  
  return true;
}
function startDescrPicsUpload(){
  document.getElementById('descr_upload_process').style.visibility = 'visible';
  document.getElementById('descr_upload_form').style.visibility = 'hidden';  
  return true;
}

function stopDescPicUpload(success){
      var result = '';
      if (success == 1){
         result = '<span class="msg">Soubor byl úspěšně nahrán! The file was succesfully uploaded!<\/span><br/><br/>';
      }
      else {
         result = '<span class="emsg">Při nahrávání souboru nastala chyba! <br/>There was an error when uploading the file! <\/span><br/><br/>';
      }
      document.getElementById('descr_upload_process').style.visibility = 'hidden';
      document.getElementById('descr_upload_form').innerHTML = result + '<label for="myfileDescr">Soubor - File:</label><input id="myfileDescr" name="myfileDescr" tabindex="1" type="file"  size="30"/><input type="submit" name="submitBtnDescr" tabindex="2" class="sbtn" value="Upload" />';
      document.getElementById('descr_upload_form').style.visibility = 'visible';      
      return true;   
}

function init_ajax(){
      document.getElementById('f1_upload_process').style.visibility = 'hidden';
      document.getElementById('f1_upload_form').style.visibility = 'visible';
      document.getElementById('video_upload_process').style.visibility = 'hidden';  
      document.getElementById('descr_upload_process').style.visibility = 'hidden';
      
}