X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fselector.js;h=51f165a0c296ee4c577b6039318141815da7bfd1;hb=3bb82a34de18b8b8e80893571d65080bf5a4702b;hp=da2724530eb00a5e4964c70a3beb3ff574dd4781;hpb=7cdddebe047302f51c4fd30823565f3ac1553d60;p=jquery.git

diff --git a/src/selector.js b/src/selector.js
index da27245..51f165a 100644
--- a/src/selector.js
+++ b/src/selector.js
@@ -96,9 +96,9 @@ jQuery.extend({
 		if ( typeof t != "string" )
 			return [ t ];
 
-		// Make sure that the context is a DOM Element
-		if ( context && !context.nodeType )
-			context = null;
+		// check to make sure context is a DOM element or a document
+		if ( context && context.nodeType != 1 && context.nodeType != 9)
+			return [ ];
 
 		// Set the correct context (if none is provided)
 		context = context || document;
@@ -320,7 +320,10 @@ jQuery.extend({
 			// :not() is a special case that can be optimized by
 			// keeping it out of the expression list
 			if ( m[1] == ":" && m[2] == "not" )
-				r = jQuery.filter(m[3], r, true).r;
+				// optimize if only one selector found (most common case)
+				r = isSimple.test( m[3] ) ?
+					jQuery.filter(m[3], r, true).r :
+					jQuery( r ).not( m[3] );
 
 			// We can get a big speed boost by filtering by class here
 			else if ( m[1] == "." )