function checkForm(obj) {
	if (obj.person_email_address.value=="") { 
		alert('Please enter your email address and try again.');
		obj.person_email_address.focus();
		return false;
	}
	if (obj.person_first_name.value=="") { 
		alert('Please enter your name and try again.');
		obj.person_first_name.focus();
		return false;
	}
	if (obj.person_age.value=="") { 
		alert('Please select your age and try again.');
		obj.person_age.focus();
		return false;
	}
	if (obj.person_gender.value=="") { 
		alert('Please select your gender and try again.');
		obj.person_gender.focus();
		return false;
	}
	obj.submit(); return true;
}