X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fcore.js;h=f6f0bd592cb416affed841b5cd87116e81b7e0d6;hb=e6fccd71031bd37300c1dfe79873b3d2529b4775;hp=80115b44278daab14aa8be5e141eee4f3a450dbd;hpb=cd455eeba7ef754f35a36b10ca27a31c14bb8a1f;p=jquery.git

diff --git a/src/core.js b/src/core.js
index 80115b4..f6f0bd5 100644
--- a/src/core.js
+++ b/src/core.js
@@ -465,13 +465,13 @@ jQuery.fn = jQuery.prototype = {
 		var parts = key.split(".");
 		parts[1] = parts[1] ? "." + parts[1] : "";
 
-		if ( value == null ) {
+		if ( value === undefined ) {
 			var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 			
-			if ( data == undefined && this.length )
+			if ( data === undefined && this.length )
 				data = jQuery.data( this[0], key );
 
-			return data == null && parts[1] ?
+			return data === undefined && parts[1] ?
 				this.data( parts[0] ) :
 				data;
 		} else
@@ -587,7 +587,7 @@ jQuery.extend = jQuery.fn.extend = function() {
 					target[ name ] = jQuery.extend( deep, src, copy );
 
 				// Don't bring in undefined values
-				else if ( copy != undefined )
+				else if ( copy !== undefined )
 					target[ name ] = copy;
 
 			}
@@ -669,7 +669,7 @@ jQuery.extend({
 			jQuery.cache[ id ] = {};
 		
 		// Prevent overriding the named cache with undefined values
-		if ( data != undefined )
+		if ( data !== undefined )
 			jQuery.cache[ id ][ name ] = data;
 		
 		// Return the named cache data, or the ID for the element