Javascript
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In every function, a private variable — argument — is automatically created, holding an array of the arguments passed to the function.
JavaScript Object-Oriented Programming Part 2 [JavaScript & AJAX Tutorials]
JavaScript Object-Oriented Programming Part 1 [JavaScript & AJAX Tutorials]
A less-known operator in JavaScript is the typeof operator. It tells you what type of data you’re dealing with.
moo.fx - the next small thing
It's very easy to use , blazing fast , cross-browser , standards compliant , provides controls to modify any CSS property of any HTML element, including colors, with builtin checks that won't let a user break the effect with multiple, crazy clicks.
In case you haven't already used it, prototype.js is a JavaScript library initially written by Sam Stephenson .
Using prototype.js v1.4.0