function slide1(id)
{
	var news = document.getElementById('last_news');
	var files = document.getElementById('last_files');
	var topics = document.getElementById('last_topics');
	switch (id)
	{
		case 1:
			news.style.visibility = 'visible';
			files.style.visibility = 'hidden';
			topics.style.visibility = 'hidden';
			break;
		case 2:
			files.style.visibility = 'visible';
			topics.style.visibility = 'hidden';
			news.style.visibility = 'hidden';
			break;
		case 3:
			topics.style.visibility = 'visible';
			news.style.visibility = 'hidden';
			files.style.visibility = 'hidden';
			break;
	}
}