Best bet is weinre.
It's really not that complicated to setup. Just get nodejs installed.
When node is installed type npm install -g weinre
to install weinre.
Then type weinre --boundHost 0.0.0.0
, it'll start weinre on your computer at port 8080.
Paste in the following in your HTML, replace 0.0.0.0
with your computers IP address, and you're ready to start debugging:
<script src="http://0.0.0.0:8080/target/target-script-min.js#anonymous"></script>