title: Javascript as command line callable scripting language
body: <p>I'm looking for a way to write some simple scripts in javascript, like I would in ruby.  For example, I might write a script like:</p>
  
  <pre><code>var str = "Hello World";
  console.log(str);
  </code></pre>
  
  <p>And i want to able to call it from my command line like this:</p>
  
  <pre><code>js hello_world.js
  </code></pre>
  
  <p>Is there some sort of Javascript runtime, that includes a standard library that would allow me to do this style of script development?  I know there is node.js, but that is specific to a web server, right?</p>