// Example file structure
htdocs // Root folder
	- index.html
	- about_us/
		- index.html
	- css/
		- base.css
	- images/
		- logo.png

If we wanted to access the image "logo.png" from "index.html", our file path would need to be:
	img/logo.png
However, if we wanted to access the image about_us/index.html, our file path would need to be:
	/img/logo.png
	OR
	../img/logo.png
The first, using a "/" at the start, takes us to our root folder, in this case it is "htdocs." The second, using "../" at the start takes us to the next directory "above" the one we're in. The directory above "about_us" is "htdocs."