How to list the properties of a JavaScript object?

Question

Say I create an object thus:

var myObject =
        {\"ircEvent\": \"PRIVMSG\", \"method\": \"newURI\", \"regex\": \"^http://.*\"};

What is

Answer 1

Note that Object.keys and other ECMAScript 5 methods are supported by Firefox 4, Chrome 6, Safari 5, IE 9 and above.

For example:

var o = {"foo": 1, "bar": 2}; 
alert(Object.keys(o));

ECMAScript 5 compatibility table: http://kangax.github.com/es5-compat-table/

Description of new methods: http://markcaudill.com/index.php/2009/04/javascript-new-features-ecma5/