Reddit Investigator-like JS app
Your code is very clean, easy to understand and well written. My only comment for improving it would be to take advantage of a framework that does some of this lifting for you, such as:


KnockoutJS
BackboneJS
AngularJS


As well, coming from an OO background, you might be interested at looking at CoffeeScript, which is a higher level language that provides class constructs and such that compiles down into regular JavaScript.