function jenCisla(){
	if ((event.keyCode<48 || event.keyCode>57) && event.keyCode != 13)
		event.returnValue = false;
	else
		event.returnValue = true;
}

function jenTelefon(){
	if ((event.keyCode<48 || event.keyCode>57) && event.keyCode != 13 
			&& event.keyCode != 32 && event.keyCode != 40 
			&& event.keyCode != 41 && event.keyCode != 43)
		event.returnValue = false;
	else
		event.returnValue = true;
}