Simple doctype: <!DOCTYPE html> Script tags just work (no need for type="text/javascript": <script></script> CSS Understand how to do general vs specific bor

Simple doctype: <!DOCTYPE html> Script tags just work (no need for type="text/javascript": <script></script> CSS Understand how to do general vs specific border/margin/etc assignments and how they cascade. Useful for generic classes: .class1{ border:1px solid #000; } .sub_class1{ border-bottom:2px solid #cc0000; } JS 0|3.14 === 3, vs Math.floor(3.14) === 3