function validateForm(f) { 
	if (f.first_name.value == '' || f.last_name.value == '' || f.email_address.value == '') { 
		alert("PLEASE enter all required information:\n\n- First Name\n- Last Name\n- Email Address\n\nThen submit the form. Thank you!\n\n"); 
		return false; 
	} 
	if (! f.email_address.value.match(/^[A-Za-z0-9_\+-]+(\.[A-Za-z0-9_\+-]+)*@[A-Za-z0-9-]+(\.[A-Za-z0-9-]+)*\.([A-Za-z]{2,4})$/)) { 
		alert("PLEASE enter a valid email address.\n\nThen submit the form. Thank you!"); 
		return false; 
	} 
	return true; 
}