title: Html:how to add a link in the child page to (one of the) parent(s) using relative path
body: <p>I have a local hierarchy of folders, each folder have some HTML files.
  the "parent" files (the outer ones) contain links to the "child" files (in this case - a single level link - the parent links to its dirrect child) so the hierarchy is like some kind of a tree.</p>
  
  <p>I want to add a link in the top of every page that will point to the parent page (the "inxed.html" file).</p>
  
  <p>my code uses relative path (so there will be a possibility to move the folder and it will still work) </p>
  
  <p>example:</p>
  
  <pre><code>  .\index.html
    .\folder1\p1.html
    .\folder1\folder2\p2.html
  </code></pre>
  
  <p>I want the possibility to have a link in the "folder1\folder2\p2.html" file that will to up the tree and will open the "index.html" page.</p>
  
  <p>I preffer using HTML only (if pissible)</p>
  
  <p>any idea?</p>