Testing jnlp file locally

[allelopath]

I'm trying to test jnlp locally on OS X.
In a directory I have an html file, a jnlp file, and a jar file.
The jnlp file cannot find the jar file.
I've tried codebase=".", but this doesn't work:
BadFieldException[ The field <jnlp>codebase has an invalid value: .,.]

The machine's local ip address is 192.168.0.6
codebase="http://192.168.0.6" href="Users/apple/Documents/ccs.jnlp
That gives this error: com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://192.168.0.6/Users/apple/Documents/ccs.jnlp

May there is something required before the "Users" directory in that path?
How can I get this to work?
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="." href="ccs.jnlp">
<information>
<title>Some TItle</title>
<vendor> - Some Vendor</vendor>
<homepage href="http://www.somewhere.edu/home.html" />
<offline-allowed />
</information>
<resources>
<j2se version="1.5+" />
<jar href="ccs.jar" />
</resources>
<application-desc main-class="ccs.MyApplication" />
</jnlp>