Jon Raasch's notes on Nicholas Zakas's Google Tech Talk "Speed Up Your JavaScript" in which he covers basic performance improvements like local variables for more expensive lookups, avoiding for in loops, casting DOM array-like objects into proper arrays, avoid touching the DOM, use classes to change CSS instead of inline styles.
A table that lists CSS style properties and their JavaScript equivalents. Useful for dynamically setting styles in JavaScript, although the better method, if possible, is to use classes instead, and those classes are styled with CSS. A few are missing, like float which is a reserved word in JavaScript.