jquery core: closes #2968. Simplified isFunction, dropping support for DOM methods...

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 7db0a8c..c095f74 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -613,9 +613,10 @@ jQuery.extend({
        },
 
        // See test/unit/core.js for details concerning this function.
+       // Since 1.3 DOM methods and function like alert
+       // aren't supported. They return false on IE (#2968).
        isFunction: function( fn ) {
-               return !!fn && typeof fn != "string" && !fn.nodeName &&
-                       fn.constructor != Array && /^[\s[]?function/.test( fn + "" );
+               return fn instanceof Function;
        },
 
        // check if an element is in a (or is an) XML document