javascript: google geo - map
<p>i have the following map of the world:</p>

<pre><code>&lt;!--
  copyright (c) 2009 Google inc.

  You are free to copy and use this sample.
  License can be found here: http://code.google.com/apis/ajaxsearch/faq/#license
--&gt;

&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
&lt;head&gt;
  &lt;meta http-equiv="content-type" content="text/html; charset=utf-8" /&gt;
  &lt;title&gt;Google Visualization API Sample&lt;/title&gt;
  &lt;script type="text/javascript" src="http://www.google.com/jsapi"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;
    google.load('visualization', '1', {packages: ['geomap']});

    function drawVisualization() {
      var data = new google.visualization.DataTable();
      data.addRows(6);
      data.addColumn('string', 'Country');
      data.addColumn('number', 'Popularity');
      data.setValue(0, 0, 'Germany');
      data.setValue(0, 1, 200);
      data.setValue(1, 0, 'United States');
      data.setValue(1, 1, 300);
      data.setValue(2, 0, 'Brazil');
      data.setValue(2, 1, 400);
      data.setValue(3, 0, 'Canada');
      data.setValue(3, 1, 500);
      data.setValue(4, 0, 'France');
      data.setValue(4, 1, 600);
      data.setValue(5, 0, 'RU');
      data.setValue(5, 1, 700);

      var geomap = new google.visualization.GeoMap(
          document.getElementById('visualization'));
      geomap.draw(data, null);
    }


    google.setOnLoadCallback(drawVisualization);
  &lt;/script&gt;
&lt;/head&gt;
&lt;body style="font-family: Arial;border: 0 none;"&gt;
&lt;div id="visualization" style="width: 800px; height: 400px;"&gt;&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>instead of displaying a map of the entire world i would like to know how to display just the US?</p>
