function alphabet_change() {
	if(document.getElementById("alphabet_rus").style.display == "none") {
		document.getElementById("alphabet_rus").style.display = "block";
		document.getElementById("alphabet_eng").style.display = "none";
	} else {
		document.getElementById("alphabet_rus").style.display = "none";
		document.getElementById("alphabet_eng").style.display = "block";
	}
}