function checkform( form ) {
    if (form.fullname.value == "") {
        alert( "Please enter your Full Name." );
        form.fullname.focus();
        return false ;
    }
    if (form.email.value == "") {
        alert( "Please enter your email address." );
        form.email.focus();
        return false ;
	}
    if (form.phone.value == "") {
        alert( "Please enter your phone number." );
        form.phone.focus();
        return false ;
	}
    if (form.golfers.value == "") {
        alert( "Please enter the number of golfers on your trip." );
        form.rounds.focus();
        return false ;
	}
	return true;
}