function doAjaxRequestGroupButton(id_group, as_no, elem, url)
{
	$(elem).addClass('toReplace-group');
	$.post(url,
			'id_group='+id_group+'&as_no='+as_no,
			function(data){
					$('.toReplace-group').fadeOut('slow', function(){
						$(data).hide().replaceAll('.toReplace-group').fadeIn();
					});
				},
			'html');
}

function becomeMember(id_group, as_no, elem)
{
	doAjaxRequestGroupButton(id_group, as_no, elem,'ajax_addGroupMember.php');
}

function unsubscribe(id_group, as_no, elem, del)
{
	doAjaxRequestGroupButton(id_group, as_no, elem,'ajax_deleteGroupMember.php');
}