function changeVal(mess, mess_len) {
	document.getElementById('msgs').value = mess.substring(0, max_symbols);
	mess = document.getElementById('msgs').value;
	mess_len = mess.length;
	document.getElementById('msgs_count').innerHTML = max_symbols - mess_len;
}
function m_chn(){
	mess = document.getElementById('msgs').value;
	mess_len = mess.length;
	document.getElementById('msgs_count').innerHTML = max_symbols - mess_len;
	if(mess_len > max_symbols){
		changeVal(mess, mess_len);
	}
	return true;
}