JS: Prototype and Right-Click

1. // Adicionando listener para right-click
2. Object.extend(Event, {
3.  isRightClick: function(event) {
4.     return (((event.which) && (event.which == 1)) ||
5.             ((event.button) && (event.button == 2)));
6.   }
7. });
8.  
9. document.observe("dom:loaded", function() {
10.     $A(document.documentElement.select('[rightClick]')).each(function(i){
11.         i.observe('contextmenu', function(){ eval(i.readAttribute('rightClick')) });
12.     });
13. });