How do I put a hyperlink to "two levels above in the directory tree"?

You can use ../index.html to refer to index.html in the parent directory.

On Windows OS, the forward-slash (/) wasn't working, so I switched to back-slash (\) and that fixed it. For example, try using the following:

"..\..\index.html"

I'm not sure exactly what you're asking, but in relative paths, ../ is 'up one level'.

So, ../index.html would take you to the index of the next directory up. Hope that helps.

to go two level up use "../../" and your normal url from two level up folder.

"../" in the path is used to go one level up. But, it can be used for more times, to go more levels up.

an example:

| HOME <br> 
+- image.jpg<br> 
|_
  |
  +- CONFIG<br>  
     |
     + PICTURE_CONFIG
       | 
       +- myfile.html

myfile.html contains:

<img src="../../image.jpg" />

the second"../" goes from PICTURE_CONFIG to CONFIG folder
the first "../"goes from CONFIG to HOME folder
"image.jpg" searches in HOME folder for the file "image.jpg"