function checkform (form) {
	if (form.name.value == "") {
		alert("Please enter your name.");
		form.name.focus();
		return false;
		}
        else if (form.phonenumber.value == "") {
                alert("Please enter your phone number.");
                form.phonenumber.focus();
                return false;
                }
	else if (form.email.value == "") {
                alert("Please enter your email address.");
                form.email.focus();
                return false;
                }
	else if (form.questions.value == "") {
                alert("Please enter your feedback.");
                form.questions.focus();
                return false;
                }
	return true;
}