title: do included javascript files have access to global variables in the parent document?
body: <p>Imagine some code something like this:</p>
  
  <pre><code>  &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd"&gt;
    &lt;HTML&gt;
    &lt;HEAD&gt;
    &lt;TITLE&gt;BLAH&lt;/TITLE&gt;
    &lt;script language='Javascript' type='text/javascript'&gt;
    var ScriptVersionReqd='1.0';
    &lt;/script&gt;
  
    &lt;script language='JavaScript' type='text/javascript' src='clientscript.js'&gt;&lt;/script&gt;
    etc. etc.
  </code></pre>
  
  <p>Does clientscript.js have access to the variable "ScriptVersionReqd"? If not, why not?</p>