// 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