+ // The body element only exists once, optimize finding it
+ if ( selector === "body" && !context && document.body ) {
+ this.context = document;
+ this[0] = document.body;
+ this.selector = "body";
+ this.length = 1;
+ return this;
+ }
+
+ // Handle HTML strings
+ if ( typeof selector === "string" ) {
+ // Are we dealing with HTML string or an ID?
+ match = quickExpr.exec( selector );
+
+ // Verify a match, and that no context was specified for #id
+ if ( match && (match[1] || !context) ) {
+
+ // HANDLE: $(html) -> $(array)
+ if ( match[1] ) {
+ doc = (context ? context.ownerDocument || context : document);
+
+ // If a single string is passed in and it's a single tag
+ // just do a createElement and skip the rest
+ ret = rsingleTag.exec( selector );
+
+ if ( ret ) {
+ if ( jQuery.isPlainObject( context ) ) {
+ selector = [ document.createElement( ret[1] ) ];
+ jQuery.fn.attr.call( selector, context, true );
+
+ } else {
+ selector = [ doc.createElement( ret[1] ) ];
+ }
+
+ } else {
+ ret = jQuery.buildFragment( [ match[1] ], [ doc ] );
+ selector = (ret.cacheable ? ret.fragment.cloneNode(true) : ret.fragment).childNodes;
+ }
+
+ return jQuery.merge( this, selector );
+
+ // HANDLE: $("#id")
+ } else {
+ elem = document.getElementById( match[2] );
+
+ // Check parentNode to catch when Blackberry 4.6 returns
+ // nodes that are no longer in the document #6963
+ if ( elem && elem.parentNode ) {
+ // Handle the case where IE and Opera return items
+ // by name instead of ID
+ if ( elem.id !== match[2] ) {
+ return rootjQuery.find( selector );
+ }
+
+ // Otherwise, we inject the element directly into the jQuery object
+ this.length = 1;
+ this[0] = elem;
+ }
+
+ this.context = document;
+ this.selector = selector;
+ return this;
+ }
+
+ // HANDLE: $("TAG")
+ } else if ( !context && !rnonword.test( selector ) ) {
+ this.selector = selector;
+ this.context = document;
+ selector = document.getElementsByTagName( selector );
+ return jQuery.merge( this, selector );
+
+ // HANDLE: $(expr, $(...))
+ } else if ( !context || context.jquery ) {
+ return (context || rootjQuery).find( selector );
+
+ // HANDLE: $(expr, context)
+ // (which is just equivalent to: $(context).find(expr)
+ } else {
+ return jQuery( context ).find( selector );