making an absolute url referencing a local image

making an absolute url referencing a local image

How do I to make an absolute URL that refers an image into my root
repertory app ?
I've tried this using /projetForum/WebContent/images/angry.gif as URL but
it doesn't work.
str = str.replace(":D", "<img
src=\"/projetForum/WebContent/images/angry.gif\" title=\"heureux\"
alt=\"heureux\" />");
Thanks in advance.