$(document).ready(function(){
  
  $('#right ul li a').toggle(function(){
    var variable = $(this).attr('class');
    $('#right ul li.'+variable).slideDown();
    $(this).css('font-weight', 'bold');
    return false;
  }, function() {
    var variable = $(this).attr('class');
    $('#right ul li.'+variable).slideUp();
    $(this).css('font-weight', 'normal');
    return false;
  });
  
  var status = false;
  
  $('#right ul li a').mouseover(function(){
    if(status == false){
      $(this).append('<img id="arrow" src="http://www.pora.pl/images/arrow.png?1242726126" alt="arrow" />');
      $(this).children('img#arrow').css({
        position: "relative",
        right: "2px",
        top: "2px"
      });
    }
    status = true;
  });
  
    $('#right ul li a').mouseout(function(){
      if(status == true){
        $(this).children('img#arrow').remove();
      }
      status = false;
    });

});