title: Sahi Script, using variable in _assertEqual
body: <p>I want to put variable to check if is Equal some text in the page, but in this way - doens't work:</p>
  
  <pre><code>function check($value) {
  
  _assertEqual($value, " - VERSION", _getText(_heading1($value, " - VERSION")));
  _click(_link("Edit[1]"));
  }
  check ("HELP")
  </code></pre>
  
  <p>The result:</p>
  
  <blockquote>
    <p>_assertEqual("HELP", " - VERSION", _getText(_heading1("HELP", " - VERSION"))); Error: The parameter passed to _getText was not found on
    the browser at check (scripts/check.sah:3) at 2015-1-28 11:53:29</p>
  </blockquote>
  
  <hr>
  
  <p>So, if I do in this way, it's works:</p>
  
  <pre><code>function check($value) {
  _assertEqual("HELP - VERSION", _getText(_heading1("HELP - VERSION")));
  _click(_link("Edit[1]"));
  }
  check ("HELP")
  </code></pre>
  
  <p>How to put this variable to works correctly?</p>