954a955
> 		var oel = el;
957,959c958,975
< 		var isSupported = (eventName in el); 
< 		if ( !isSupported ) { 
< 			el.setAttribute(eventName, "return;"); 
---
> 		var isSupported = true;
> 		var isSafe = true;
> 		if ( typeof el.wrappedJSObject == 'object' ) {
> 			// Detected Firefox with Greasemonkey (or other protected addon)
> 			if ( typeof el.wrappedJSObject.__lookupGetter__(eventName) !== 'undefined' || 
> 			     typeof el.wrappedJSObject.__lookupSetter__(eventName) !== 'undefined' ) {
> 				// A custom getter was detected. It can be:
> 				// 1) Attemt to inject unsafe code into previleged scope with __define[GS]etter__
> 				// 2) Page script authors knows what they do. So we only SUPPOSE that isSupported = true (most probably)
> 				// It is unsafe to access a property with the custom getter
> 				isSafe = false;
> 			} else {
> 				el = el.wrappedJSObject;
> 			}
> 		}
> 
> 		if ( isSafe && !(eventName in el) ) {
> 			oel.setAttribute(eventName, "return;");
962c978
< 		el = null; 
---
> 		oel = el = null;