function menu1(SelectObject) {

if (SelectObject.checked == true){
menuMemo();
	} else {
    document.inform.Sport.options[0].selected = true;
    }
}

function menuMemo() {
alert("Per favore selezionate, dal menu\na fianco, il tipo di sport prescelto.\nGrazie.");
}

function menuChng(SelectObject) {
  var Option;
  var index;

  for ( index=0 ; index < SelectObject.options.length ; index++ ) {
    if ( SelectObject.options[index].selected == true ) {
     Option = SelectObject.options[index].text;
     index = SelectObject.options.length;
    }
  }

  if ( Option == "Scelta sport" ) {

	document.inform.Ragazzi.checked = false;
    } else {
    document.inform.Ragazzi.checked = true;
    }
}

<!-- EMAIL ANTILEECH SCRIPT by Frederic Andrieux & Boweries Inc. Ltd. (c)2002 -->
<!-- http://www.boweries.com/scripts/email_antileech.shtml -->

function sendmail (address) {
address = address.split("^bbr+");
address = address.join("@");
window.open ('mailto:'+address,'_self');
}

function sendelios (address) {
address = address.split("+em*");
address = address.join("@");
window.open ('mailto:'+address,'_self');
}