JSE8 not recognising url's

Question

Please forgive my ignorance, I'm a noo-bee.
I'm using Sun Java Studio Enterprise 8 using JDK 1.5 and TomCat 5.5.7. I'm writting an web application and I'm having problems having the servlet or jsp's recognise a url, be it a gif or another jsp (as in a forward). This same jsp/servlet or html file in another application will see the url.
I know this must be an entry into a config file/ property file etc... but for the life of me I can't figure this out.
Any help would be appreciated.
Thanks

Answer 1

Thanks for your response,
The file layout is about the same as is diagramed in the provided url. My file layout looks like this.
Root file ==> src folder==> Java folder==>WxComp folder (contains servlet and .java files)
Root file ==>Web folder (contains my html, jsp and .jpg files)
2 issues with url's
The first has to do with pulling in a .jpg file. I origionally had my .jpg files in a folder named image at the web folder level, but I moved it to be in the web folder and I was able to get it to display ok. However another .jpg file in the exact same folder won't display. If I use an html editor they will both display fine.
The html code looks like this
<tr>
<td><img src="\WxComp.jpg"
alt="Weather logo" width="25%" height="100" hspace="0" vspace="0">
<td><img src="\weather_header.jpg"
alt="Weather Verify" width="75%" height="100" hspace="0" vspace="0">
The file "\weather_header.jpg" is rendered by the jsp but the file "\WxComp.jpg" which is in the same root isn't.
The second issue is in doing a forward to my jsp from the servlet. I've done this in WSAD but I'm not sure what I'm doing wrong here.
The servlet resides with the rest of the .java files and has been added to the web.xml file. The code for this is....
String url="/web/Wx-Compare.jsp";
ServletContext sc = getServletContext();
RequestDispatcher rd = sc.getRequestDispatcher(url);
rd.forward(request, response);
This should be correct (at least I hope, I still find myself making nubee mistakes). The first "/" designates the root file so I'm confused.
Again thanks for your response.