$(document).ready(function (){
	$('.button_show').click(function (){
		$('.hidden_list,button_show').show("blind");
		$('.button_show').css('display','none');
		$('.button_show_a').css('display','block');		
	});	
	$('.button_show_a').click(function (){
		$('.hidden_list,button_show').hide("blind");
		$('.button_show').css('display','block');
		$('.button_show_a').css('display','none');		
	});	
});