https://groups.google.com/forum/?fromgroups#!topic/jointjs/r9JhBZhqeQI

var cubeA = paper.rect(100, 100, 50, 50); 
                        cubeA.attr({"fill":"red"}); 
                        cubeA.draggable.enable(); 
var cubeB = paper.rect(400, 100, 50, 50); 
                        cubeB.attr({"fill":"blue"}); 
                        cubeB.draggable.enable(); 

var all = [cubeA, cubeB]; 
CubeA.joint(cubeB, Joint.dia.uml.arrow).registerForever(all); 
CubeB.joint(cubaA, 
Joint.dia.uml.aggregationArrow).registerForever(all); 


http://dev.enekoalonso.com/2009/01/18/spinning-color-wheel-mootools-raphael-svg/

http://stackoverflow.com/questions/5779820/attempting-to-use-mootools-and-raphael

http://www.desarrolloweb.com/manuales/manual-mootools.html
http://mootorial.com/wiki/
http://sixrevisions.com/javascript/mootools_tutorials_and_example/
http://cancerbero.vacau.com/raphaeltut/
http://stackoverflow.com/questions/176324/why-does-everyone-like-jquery-more-than-prototype-script-aculo-us-or-mootools-or
http://www.maestrosdelweb.com/editorial/comparacion-frameworks-javascript/
http://readysetraphael.com/
http://taitems.tumblr.com/post/549973287/drawing-arrows-in-raphaeljs

http://www.coders.me/web-js-html/javascript/sexy-alert-box
http://www.coders.me/ejemplos/sexy-alert-box/


http://jsfiddle.net/nickjbyrne/vXHUb/8/ clone