From 727d51ec9df1dadd742fc468ca3e003da172fb1b Mon Sep 17 00:00:00 2001
From: Dave Methvin <dave.methvin@gmail.com>
Date: Tue, 16 Aug 2011 19:25:32 -0400
Subject: [PATCH] Save a few bytes, thanks @danheberden!

---
 src/css.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/css.js b/src/css.js
index da0dd20c8f..e5a93fce12 100644
--- a/src/css.js
+++ b/src/css.js
@@ -6,7 +6,7 @@ var ralpha = /alpha\([^)]*\)/i,
 	rupper = /([A-Z]|^ms)/g,
 	rnumpx = /^-?\d+(?:px)?$/i,
 	rnum = /^-?\d/,
-	rrelNum = /^([+\-])=([+\-\.\de]+)/,
+	rrelNum = /^([-+])=([-+.\de]+)/,
 
 	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
 	cssWidth = [ "Left", "Right" ],
@@ -85,7 +85,7 @@ jQuery.extend({
 
 			// convert relative number strings (+= or -=) to relative numbers. #7345
 			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
-				value = (ret[1] === "+"? +ret[2] : -ret[2]) + parseFloat( jQuery.css( elem, name ) );
+				value = ( +( ret[1] + 1) * +ret[2] ) + parseFloat( jQuery.css( elem, name ) );
 				// Fixes bug #9237
 				type = "number";
 			}