$(document).ready(function(){

  $('.a_search_adv').click(function(){
     
	 class_name = $(this).attr('href').split("#");
	 class_name = class_name[1];

	 var tmp = $('.'+class_name).css('display');
	 if (tmp == 'none')
	  {
		$('.'+class_name).fadeIn('slow');
		$(this).html('« wyszukiwanie proste');
	  }else{
		$('.'+class_name).fadeOut(50);
		$(this).html('wyszukiwanie zaawansowane »');
	  }
  });	 
});