What is ../.. , ../ : <p>I have strugure folder like this </p>

<pre><code>root
  || client
  || libs  \\bower install 
   ||src
       index.html
</code></pre>

<p>In index I try inject  <code>../jquery.js</code> but I get not found . Where is my wrong . And I want ask what is <code>../..</code> , <code>'../</code>  </p>
