function validate_login(form) {
	var e = form.elements, m = '';
	
	if(!e['username'].value) {
		m += '- Username is required.\n\n';
	}
	if(!e['password'].value) {
		m += '- Password is required.\n\n';
	}
		if(m) {
		alert('The following error(s) occurred:\n\n' + m);
		return false;
	}
	return true;
}

function validate_topic(form) {
	var e = form.elements, m = '';
	
	if(!e['headline'].value) {
		m += '- Headline is required.\n\n';
	}
	if(!e['description'].value) {
		m += '- Description is required.\n\n';
	}
		if(m) {
		alert('The following error(s) occurred:\n\n' + m);
		return false;
	}
	return true;
}

function validate_reply(form) {
	var e = form.elements, m = '';
	
	if(!e['message'].value) {
		m += '- Message is required.\n\n';
	}
		if(m) {
		alert('The following error(s) occurred:\n\n' + m);
		return false;
	}
	return true;
}