Esp files and context root of a web application

[Scott Taylor]

I want to create a html.esp file that contains links to stylesheets, 
however I would like to create the links so that they take into 
consideration the context root of the web application. In jsp pages I 
would use something like this <c:url value='/css/styling.css'/>. Is 
there something equivalent in esp pages?

/Scott
P.S. I suspect that this question might be strictly a EcmaScript 
question and not have much to do with how Sling uses it. If so I 
apologize for posting it here. Can some kind soul post a good link to a 
site explaining EcmaScript in a webapplication. (Eg. how do you read 
http parameters, get access to request and response object, etc...)