X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Feffects.js;h=d9e9a8b3137bfb51b2f065dda34ed2591ba07375;hb=58faec7cb7e820ef910b4850f5234da3989e6961;hp=0b08bc2dae7ec07b09eae1b0fee1c04195af8f74;hpb=c5edf982d59977c506fececd504a3dbfd1a398dc;p=jquery.git

diff --git a/src/effects.js b/src/effects.js
index 0b08bc2..d9e9a8b 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -185,11 +185,11 @@ jQuery.fn.extend({
 
 				} else {
 					var parts = rfxnum.exec(val),
-						start = e.cur() || 0;
+						start = e.cur();
 
 					if ( parts ) {
 						var end = parseFloat( parts[2] ),
-							unit = parts[3] || jQuery.cssNumber[ name ] ? "" : "px";
+							unit = parts[3] || ( jQuery.cssNumber[ name ] ? "" : "px" );
 
 						// We need to compute starting value
 						if ( unit !== "px" ) {
@@ -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
@@ -348,7 +352,7 @@ jQuery.fx.prototype = {
 		this.startTime = jQuery.now();
 		this.start = from;
 		this.end = to;
-		this.unit = unit || this.unit || jQuery.cssNumber[ this.prop ] ? "" : "px";
+		this.unit = unit || this.unit || ( jQuery.cssNumber[ this.prop ] ? "" : "px" );
 		this.now = this.start;
 		this.pos = this.state = 0;