X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Ffx%2Ffx.js;h=d83bf0dd431075fcdbe5428ca76ec3ba4e756819;hb=8ec860d637ca667e8050e0755d55fc1496301d96;hp=0ede5eea9ed402743643709d5610b8c430b308ee;hpb=a3806202ffe1ecc85ba6213f06cc7b6f68c49695;p=jquery.git

diff --git a/src/fx/fx.js b/src/fx/fx.js
index 0ede5ee..d83bf0d 100644
--- a/src/fx/fx.js
+++ b/src/fx/fx.js
@@ -363,7 +363,7 @@ jQuery.extend({
 			easing: fn && easing || easing && easing.constructor != Function && easing
 		};
 
-		opt.duration = (opt.duration.constructor == Number ? 
+		opt.duration = (opt.duration && opt.duration.constructor == Number ? 
 			opt.duration : 
 			{ slow: 600, fast: 200 }[opt.duration]) || 400;