Add support in OL for right-click capturing, including dbl-right-clicks (for zooming out in navigation control). Thanks to David Martin for this nice patch and the great 8 foot austrian for his review (Closes #1359)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@7872 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Events.js

@@ -104,6 +104,21 @@ OpenLayers.Event = {
                 ((event.button) && (event.button == 1)));
     },
 
+    /**
+     * Method: isRightClick
+     * Determine whether event was caused by a right mouse click. 
+     *
+     * Parameters:
+     * event - {Event} 
+     * 
+     * Returns:
+     * {Boolean}
+     */
+     isRightClick: function(event) {
+        return (((event.which) && (event.which == 3)) ||
+                ((event.button) && (event.button == 2)));
+    },
+     
     /**
      * Method: stop
      * Stops an event from propagating. 
@@ -352,7 +367,7 @@ OpenLayers.Events = OpenLayers.Class({
     BROWSER_EVENTS: [
         "mouseover", "mouseout",
         "mousedown", "mouseup", "mousemove", 
-        "click", "dblclick",
+        "click", "dblclick", "rightclick", "dblrightclick",
         "resize", "focus", "blur"
     ],