Prototype.js - Useful Methods
Method Description $() If provided with a string, returns the element in the document with matching ID; otherwise returns the passed element. $$() Takes an arbitrary number of CSS selectors (strings) and returns a document-order array of extended DOM elements that match any of them. $A() Converts the single argument it receives into an Array object. $F() Returns the value of a form control. This is a convenience alias of Form.Element.getValue. $H() Converts objects into enumerable Hash objects that resemble associative arrays $R() Creates a new ObjectRange object. $w() Splits a string into an Array, treating all whitespace as delimiters. Try.these Accepts an arbitrary number of functions and returns the result of the first one that doesn't throw an error.