Revert Event#findElement changes from 6bb309a

src/dom/event.js

@@ -149,8 +149,12 @@
   function findElement(event, expression) {
     var element = Event.element(event);
     if (!expression) return element;
-    var elements = [element].concat(element.ancestors());
-    return Prototype.Selector.find(elements, expression, 0);
+    while (element) {
+      if (Prototype.Selector.match(element, expression)) {
+        return Element.extend(element);
+      }
+      element = element.parentNode;
+    }
   }
   
   /**