title: ScriptEngine is Null for getEngineByName("JavaScript")?
body: <pre><code>ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
  </code></pre>
  
  <p>engine is null??? Also i try to iterate through the scriptEnginefactories it's zero...</p>
  
  <p>i have js-1.7R1.jar on my classpath...can anyone tell me what i need to do else to register the javascript engine( I found Rhino which is js-1.7r.jar)</p>
  
  <p>Thanks.</p>