function show(id){
	el = document.getElementById(id);
	el.style.display = el.style.display=='none'?'block':'none'; 
}
function resize(){
	htmlheight = document.body.parentNode.scrollHeight;
	windowheight = window.innerHeight;
	vyska = windowheight > htmlheight ? windowheight : htmlheight;
	vyska -= 150;
	document.getElementById('page').style.height = vyska+'px';
}