$(document).ready(function(){
	$('#teri').change(
		function(){
			document.getElementById('attalumiForm').submit();
		}
	);
	document.getElementById('attalumiForm').onsubmit = function(){
		if( $('#from').val() == -1){
			alert(txtFrom);
			$('#from').focus();
			return false;
		}
		if( $('#to').val() == -1){
			alert(txtTo);
			$('#to').focus();
			return false;
		}
	}
});