X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Feffects.js;h=d9e9a8b3137bfb51b2f065dda34ed2591ba07375;hb=85d9343271da85fc945bf37a604873eaf247a3a7;hp=fd832ce4a886c93a75856e78f722b1c912bf3536;hpb=faa6fe32f72900d7b31000caead2794a8346f6d8;p=jquery.git

diff --git a/src/effects.js b/src/effects.js
index fd832ce..d9e9a8b 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -185,7 +185,7 @@ jQuery.fn.extend({
 
 				} else {
 					var parts = rfxnum.exec(val),
-						start = e.cur() || 0;
+						start = e.cur();
 
 					if ( parts ) {
 						var end = parseFloat( parts[2] ),
@@ -336,8 +336,12 @@ jQuery.fx.prototype = {
 			return this.elem[ this.prop ];
 		}
 
-		var r = parseFloat( jQuery.css( this.elem, this.prop ) );
-		return r || 0;
+		var parsed,
+			r = jQuery.css( this.elem, this.prop );
+		// Empty strings, null, undefined and "auto" are converted to 0,
+		// complex values such as "rotate(1rad)" are returned as is,
+		// simple values such as "10px" are parsed to Float.
+		return isNaN( parsed = parseFloat( r ) ) ? !r || r === "auto" ? 0 : r : parsed;
 	},
 
 	// Start an animation from one number to another