function switch2nalez(){
    document.getElementById('Plany').className= "hidden";
	document.getElementById('Nalezy').className= "visible";
	btnNalezy.disabled = true;
    btnPlany.disabled = false;
	
}
function switch2plan(){
	document.getElementById('Nalezy').className= "hidden";
    document.getElementById('Plany').className=  "visible";
	btnPlany.disabled = true;
	btnNalezy.disabled = false;
}