new Image().src = "/images/indicator.gif";
function showProgressIndicator(id){
  if ( el = $(id)){ 
    el.innerHTML = '<img src="/images/indicator.gif"> Подождите, идет обращение к серверу';
  }
}

function hideProgressIndicator(id){
  if ( el = $(id)){ 
    el.innerHTML = '';
  }
}  

var prev_invite = null;
function toggleInviteCite(id){
      if ($(prev_invite) && (prev_invite != id))  $(prev_invite).style.display = "none";
      prev_invite = id;
      if ($(id)){
          if ( $(id).style.display == "none" ){
              $(id).style.display = "block";
          } else {
              $(id).style.display = "none";
          }    
      }     
}