JavaScript as stand alone without browser?

Is there a way to run a JavaScript program as a stand alone program instead of in a web browser?

Specifically, I like the way http://prettydiff.com/ beeautifies HTML code, but the cut/paste to/from the web browser window is tedious. I downloaded markup_beauty.js from the website, plus a dozen other *.js files that might go with it, plus there's a page of documentation at http://prettydiff.com/documentation.php

But I'm not sure how to proceed.
markup-beauty.js
deleydAsked:
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Dave BaldwinFixer of ProblemsCommented:
This version from Google http://code.google.com/p/v8/ says it can run standalone.  But you have to 'build' it yourself, it's not a binary.  Some others are listed here http://en.wikipedia.org/wiki/JavaScript_engine but I'm not sure how many are standalone.
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Lalit ChandraCommented:
you can refer to know more in depth

http://stackoverflow.com/questions/1075600/running-javascript-standalone-engine

But,if you directly go to use/run then visit

1.      https://developer.mozilla.org/en/SpiderMonkey
2.      http://www.mozilla.org/rhino/
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deleydAuthor Commented:
I got the solution from the author. He gave me this file, wsh.wsf (which I tried to upload but couldn't because .wsf is not on the list of approved extensions).

Windows Scripting Host can run JavaScript files.

To pass the parameters to the JavaScript file I needed a special wsh.wsf file. The instructions then are:

Save file wsh.wpf to your downloads of markup_beauty.js and markupmin.js

Then open a command prompt in windows.  Navigate to the directly where the three files are then type:

cscript wsh.wsf /source:"name_of_your_file.xml"

Remember that the HTML option is off by default, so if prefer to use this tool with HTML then you need to turn that option on:

cscript wsh.wsf /source:"name_of_your_file.html" /html:true
wsh.wsf.txt
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deleydAuthor Commented:
Got answer from author.
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