X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Fcore.js;h=32e850f55292c330d6c8cc59950a8ec4390d9c0d;hb=77344f4c50386690782ab8ddc92898a918f54f5c;hp=b731eb839efc0060c25eda0846be3ed61f9b5a62;hpb=ab551c2b14ac6b0511cf3da10ca224ce461a0f10;p=jquery.git

diff --git a/src/core.js b/src/core.js
index b731eb8..32e850f 100644
--- a/src/core.js
+++ b/src/core.js
@@ -350,7 +350,7 @@ jQuery.fn = jQuery.prototype = {
 	},
 
 	hasClass: function( selector ) {
-		return this.is( "." + selector );
+		return !!selector && this.is( "." + selector );
 	},
 
 	val: function( value ) {
@@ -945,7 +945,7 @@ jQuery.extend({
 		context = context || document;
 
 		// !context.createElement fails in IE with an error but returns typeof 'object'
-		if ( context.createElement === undefined )
+		if ( typeof context.createElement === "undefined" )
 			context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 
 		jQuery.each(elems, function(i, elem){