HTML relative path--The writing of superior directory and subordinate directory

How to represent the parent directory, ... /indicates the directory in which the source file is located, ... /.. /represents the parent directory on the directory where the source file resides, and so on.

How to represent a parent directory
.. /indicates the directory in which the source file is located, ... /.. /represents the parent directory on the directory where the source file resides, and so on.

Suppose the info.html path is: c:\Inetpub\wwwroot\sites\blabla\info.html
Suppose the index.html path is: c:\Inetpub\wwwroot\sites\index.html
The code that joins the index.html hyperlink in info.html should write this:
index.html
Suppose the info.html path is: c:\Inetpub\wwwroot\sites\blabla\info.html
Suppose the index.html path is: c:\Inetpub\wwwroot\index.html
The code that joins the index.html hyperlink in info.html should write this:
index.html
Suppose the info.html path is: c:\Inetpub\wwwroot\sites\blabla\info.html
Suppose the index.html path is: c:\Inetpub\wwwroot\sites\wowstory\index.html
The code that joins the index.html hyperlink in info.html should write this:
index.html
How to represent a file that refers to a subordinate directory to a subordinate directory, directly to the path of the subordinate directory file. Suppose the info.html path is: c:\Inetpub\wwwroot\sites\blabla\info.html Suppose the index.html path is: c:\Inetpub\wwwroot\sites\blabla\html\ Index.html the code to add index.html hyperlinks in info.html should be written like this: index.html
Suppose the info.html path is: c:\Inetpub\wwwroot\sites\blabla\info.html
Suppose the index.html path is: c:\Inetpub\wwwroot\sites\blabla\html\tutorials\index.html
The code that joins the index.html hyperlink in info.html should write this:
index.html