Aaron Dai mrvicadai

	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<title>D3: Subselection Example</title>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script>
	<style type="text/css">

	body {
	font: 13px sans-serif;

	function keepTrying(otherArgs, promise) {
	promise = promise\|\|new Promise();

	// try doing the important thing

	if(success) {
	promise.resolve(result);
	} else {
	setTimeout(function() {
	keepTrying(otherArgs, promise);