title: Change variable value using onchange
body: <p>I want to change the value of <code>value</code> using a <code>change</code> event listener. Is it possible? Here is my sample code:</p>
  
  <pre><code>&lt;select name="select1" onchange="updatevariable(this.value)"&gt; 
      &lt;option value="2" &gt;2&lt;/option&gt;
  &lt;option value="15" &gt;15&lt;/option&gt; 
  &lt;/select&gt;
  &lt;script type="text/javascript"&gt;
      value = "test";
      function updatevariable(data) { 
          value = data;       
      }
      alert(value); // It should be 2/15
  &lt;/script&gt;
  </code></pre>