Absolute URL

[Wang, Jianming]

Hi, 

Is there a way to know a resource's absolute URL?  I have a image, say
img1.gif.  I want to reference it using
http://www.something:port/appName/graphics/img1.gif in jsp page.  How can I
get all these information to create the url?  I use tomcat 3.2 and it
doesn't support ServletContext.getServletContextName().  Could you give me a
help?  Thanks in advance.

Jianming Wang