From: John Resig <jeresig@gmail.com>
Date: Mon, 22 Jan 2007 02:17:47 +0000 (+0000)
Subject: Added new function-testing code that is completely cross-browser compatible.
X-Git-Url: http://git.asbjorn.biz/?a=commitdiff_plain;h=b81ea5f9ba19734f0409390bdf2fb685d7498bdc;p=jquery.git

Added new function-testing code that is completely cross-browser compatible.
---

diff --git a/src/jquery/jquery.js b/src/jquery/jquery.js
index 38c8da3..c712b48 100644
--- a/src/jquery/jquery.js
+++ b/src/jquery/jquery.js
@@ -1222,8 +1222,11 @@ jQuery.extend({
 			$ = jQuery._$;
 	},
 
+	// This may seem like some crazy code, but trust me when I say that this
+	// is the only cross-browser way to do this. --John
 	isFunction: function( fn ) {
-		return fn && typeof fn == "function";
+		return !!fn && typeof fn != "string" &&
+			typeof fn[0] == "undefined" && /function/i.test( fn + "" );
 	},
 
 	/**