function toggle_show_section(sectionid, contractimgname, expandimgname){
  var target = document.getElementById(sectionid);
  if (target != null){
    var childblock = document.getElementById('chi'+sectionid);
    var imgcontrol = document.getElementById('li'+sectionid);
    if (childblock != null){
      if (childblock.style.display=='none'){
        childblock.style.display='block';
        if (imgcontrol != null){
          imgcontrol.style.backgroundImage='url(\''+expandimgname+'\')';
        }
      } else { 
        childblock.style.display='none';
        if (imgcontrol != null){
         imgcontrol.style.backgroundImage='url(\''+contractimgname+'\')';
        }
      }
    }
  }
}

function toggle_tick_pid(pid){
  var target = document.getElementById(pid);
  if (target != null){
    target.checked = !target.checked;
  }
}

function disable_element(pid){
    var target = document.getElementById(pid);
    if (target != null){
        target.disabled = true;
    }
}