Utility Methods

$(id | element) returns an HTMLElement (or array).
$$(cssRule) returns an HTMLElment array.
$F(element) returns value of a form control.
$H([obj]) creates a Hash table.
$R(start, end) returns an ObjectRange: $R(5, 23)
$w(String) splits a string into an array using whitespace as delimiter.
Try.these(Function...) tries all functions until one that does not throw an error.
document.getElementsByClassName(className) returns an HTMLElement.