function change_news(number) {
	for (var a=1; a<=4; a++){			
		document.getElementById('news_top_bg_' + a).className = 'news_top_unactive';
		document.getElementById('news_top_opis_' + a).style.display = 'none';
		document.getElementById('news_top_foto_' + a).style.display = 'none';
	}
	document.getElementById('news_top_bg_' + number).className = 'news_top_active';
		document.getElementById('news_top_opis_' + number).style.display = 'block';
		document.getElementById('news_top_foto_' + number).style.display = 'block';
}

function check_wys() {
	//var wysokosc = document.getElementsById('content-size-check').height;
	wysokosc = document.getElementsByTagName('div')['content-size-check'].offsetHeight;
	
	document.getElementsByTagName('div')['left-side-wys'].style.height = wysokosc + 'px';
	document.getElementsByTagName('div')['right-side-wys'].style.height = wysokosc + 'px';
}