function smf_change_block(block_id)
{
	if (block_id == 'top_topics')
	{
		if (!block_last_forum)
		{
			block_id = 'last_topics';
			block_last_forum = 1;
			document.getElementById('block_title').innerHTML = "<span>Рейтинг топиков</span>";
		}
		else
		{
			block_last_forum = 0;
			document.getElementById('block_title').innerHTML = "<span>Последние сообщения</span>";
		}
	}
	need_block = document.getElementById(block_id);
	document.getElementById('last_topics').style.display = 'none';
	document.getElementById('top_topics').style.display = 'none';
	document.getElementById('forum_topics').style.display = 'none';
	need_block.style.display = '';
	
	if (need_block.innerHTML != '')
	{
		return false;
	}
	else
	{
		need_block.innerHTML = '<img src="/templates/fe2/images/loader.gif" />';
	}
	var ajax = new dle_ajax();
	if (block_id == 'top_topics') 
	{
		ajax.requestFile = dle_root + "engine/ajax/smf_top_topics.php";
		ajax.element = 'top_topics';
	}
	else
	{
		ajax.requestFile = dle_root + "engine/ajax/smf_topics_forum.php";
		ajax.element = 'forum_topics';
	}
	ajax.method = 'GET';
	ajax.sendAJAX('');

	return false;
};
var block_last_forum = 1;