if( typeof( window['SITE_ROOT'] ) == 'undefined' ){
  SITE_ROOT = "";
}

LoadingMessage = {
  messages : 0,
  inited : false,
  id : 'loading_message',
  
  init : function(){
    LoadingMessage.inited = true;
    var lmt = new Element("p").update("Loading...");
    var lmimg = new Image()
    lmimg.src = SITE_ROOT+"images/progress_active.gif"
    var lmp = new Element("p").appendChild( lmimg );
    var lmd = new Element("div", { id : LoadingMessage.id, style : 'display:none' }).update( lmt ).insert( lmp )
    $(document.body).appendChild(lmd)
  },
  
  show : function(){
    if( !LoadingMessage.inited ){
      LoadingMessage.init()
    }
    if ( LoadingMessage.messages < 1 ){
      $(LoadingMessage.id).show();
    }
    LoadingMessage.messages += 1;
  },
  
  hide : function(){
    LoadingMessage.messages -= 1;
    if( LoadingMessage.messages < 1 ){
      $(LoadingMessage.id).hide();
      LoadingMessage.messages = 0;
    }
  }
}