Incorporating script.aculo.us into a website requires copying all JavaScript files in a folder and the following lines inserted in the head of an [[HTML]] document:
These lines must be loaded first before any JavaScript requesting any Prototype or script.aculo.us functions. Once loaded, these functions can be called in any valid JavaScript ___location including script tags and event handlers.
An alternative to copying all JavaScript files and hosting them locally to a website, Google provides an [http://code.google.com/apis/ajaxlibs/ Ajax Libraries API] that provides both Prototype and script.aculo.us which can be accessed using the Ajax API or directly as above: