jquery core: closes #1480, isFunction is even tougher.

diff --git a/src/core.js b/src/core.js
index 98a0dc4..e988d48 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -615,7 +615,7 @@ jQuery.extend({
        // See test/unit/core.js for details concerning this function.
        isFunction: function( fn ) {
                return !!fn && typeof fn != "string" && !fn.nodeName &&
-                       fn.constructor != Array && /function/i.test( fn + "" );
+                       fn.constructor != Array && /^[\s[]?function/.test( fn + "" );
        },
 
        // check if an element is in a (or is an) XML document