+ var internalKey = jQuery.expando, getByName = typeof name === "string", thisCache,
+
+ // We have to handle DOM nodes and JS objects differently because IE6-7
+ // can't GC object references properly across the DOM-JS boundary
+ isNode = elem.nodeType,
+
+ // Only DOM nodes need the global jQuery cache; JS object data is
+ // attached directly to the object so GC can occur automatically
+ cache = isNode ? jQuery.cache : elem,
+
+ // Only defining an ID for JS objects if its cache already exists allows
+ // the code to shortcut on the same path as a DOM node with no cache
+ id = isNode ? elem[ jQuery.expando ] : elem[ jQuery.expando ] && jQuery.expando;
+
+ // Avoid doing any more work than we need to when trying to get data on an
+ // object that has no data at all
+ if ( (!id || (pvt && id && !cache[ id ][ internalKey ])) && getByName && data === undefined ) {
+ return;