Here are some resources for if statements:
- Khan Academy’s lesson on if statements: https://www.khanacademy.org/computing/computer-programming/programming/logic-if-statements/p/if-statements
- Code Academy’s control flow lesson: http://www.codecademy.com/courses/javascript-beginner-en-qDwp0/0/1?curriculum_id=506324b3a7dffd00020bf661
- Code Monster’s If and Comparison Lessons (Lesson 10): http://www.crunchzilla.com/code-monster
And this week’s assignment problems: http://jsfiddle.net/zeroth_hour/n6qcaakn/