How can I refer to the root folder of my web application

[Dave]

Sorry, another quick question,

How can I refer to the root of my web application?

Say I have an image in my root folder that I want to use in a subfolder of a
subfolder of the web application. Do I need to know how many directory
levels deep I am to reference it?

 

[Dave]

John Morales answered this in my other post. The answer is to start the
reference with a tilde '~'

-Dave