JavaScript For Cats
Introduction
1. The console
2. Strings
3. Values and variables
4. Using functions
5. Built in JS functions
6. Download new JS functions
7. Writing new functions
8. Loops
9. Arrays
10. Objects
11. Callbacks
12. Recommended reading

JavaScript For Cats

Recommended reading

JavaScript For Cats skips over lots of details that aren't important for getting started (cats are not known for their attention spans), but if you feel like you need to dive in deeper then check these out:

NodeSchool.io ⇗ is a community driven, open source educational software that teaches various web development skills in an interactive, self-guided format. I helped make NodeSchool! Sadly it features fewer cats than this page.
Eloquent Javascript ⇗ is a free book that teaches you JavaScript! It's pretty good! Especially the chapter on values, variables, and control flow ⇗
Mozilla's JavaScript Guide ⇗ also has a pretty sweet intro chapter called values, variables and literals ⇗
Felix's Node.js Style Guide ⇗ was written about programming JavaScript on the server-side using Node.js but there are lots of tips in here that are useful for anyone programming with JavaScript.