Quick Test javascript snippet for browser compatibility

Question

Just as we have http://www.sliver.com/dotnet/SnippetCompiler/ (link inactive on 2021-04-24) to test a C# code quickly, I can also do the same for javascript in chrome debugger tools and Firebug (firefox).

I would be more interested in a tool or some online tool which can run a small piece of javascript and tell if it properly runs in prominent browsers and the result.

UPDATE:
I'm a developer and not tester. I don't want to install all browsers on my PC. I like chrome and I can debug/test (for syntax/result) almost every javascript quickly in chrome by just clicking Ctrl+Shift+J and pasting my javascript in its console. But that will just test if it works in chrome. I'm not interested in creating a library right now. Google and Stackoverflow helps me get the greatest and latest javascript for a specific task very quickly.

Answer 1

I found one way. But it is not that quick and still would like to know better answer. May be some kind of tool which can do this.

One Way:-
Write your javascript enclosed in try-catch block on JsBin and create its public link. Now check your link with BrowserShots.

Write considerable amount of html (conditionally) using javascript to be able to see the difference on Images given by BrowserShots.