Is there a way to check javascript of someone else's code?

[lv211]

I'm running a script on my site and I need to figure out what it is doing. It seems to be obfuscated (or at least I can't figure out what its doing).

I want to make sure that it can not be used in an xss attack on my site.

Are there any programs that will let you see the effect of a javascript on the website by showing what functions are being executed on the site itself?

[webexpert]

ofcourse possible if code is open (free from any encryption) :)

[MMJ]

Of course.

Most js encryption methods are easily bypassed and none are 100% foolproof. Post a link or the code.

[ltdraper]

Run it through a code formatter, such as javascript.about.com/b/2007/06/02/format-your-javascript.htm

Or open it in Firebug and have a look. If your browser can read it, so can you.