+ return 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 != "string" && !fn.nodeName &&
+ fn.constructor != Array && /function/i.test( fn + "" );
+ },
+
+ // check if an element is in a XML document
+ isXMLDoc: function(elem) {
+ return elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
+ },
+
+ nodeName: function( elem, name ) {
+ return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();