From aae0617c834a030902cd8da2714f852d6a1431be Mon Sep 17 00:00:00 2001
From: jeresig <jeresig@gmail.com>
Date: Sat, 5 Dec 2009 15:12:02 -0500
Subject: [PATCH] Made sure that css() in IE handles negative non-px values
 correctly. Fixes #3331.

---
 src/css.js       | 4 ++--
 test/unit/css.js | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/css.js b/src/css.js
index a16298d6c..c36b6dcc2 100644
--- a/src/css.js
+++ b/src/css.js
@@ -5,8 +5,8 @@ var rexclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 	rfloat = /float/i,
 	rdashAlpha = /-([a-z])/ig,
 	rupper = /([A-Z])/g,
-	rnumpx = /^\d+(?:px)?$/i,
-	rnum = /^\d/,
+	rnumpx = /^-?\d+(?:px)?$/i,
+	rnum = /^-?\d/,
 
 	// cache check for defaultView.getComputedStyle
 	getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
diff --git a/test/unit/css.js b/test/unit/css.js
index c199ca1eb..76274752e 100644
--- a/test/unit/css.js
+++ b/test/unit/css.js
@@ -59,13 +59,16 @@ test("css(String|Hash)", function() {
 });
 
 test("css(String, Object)", function() {
-	expect(20);
+	expect(21);
 	ok( jQuery('#nothiddendiv').is(':visible'), 'Modifying CSS display: Assert element is visible');
 	jQuery('#nothiddendiv').css("display", 'none');
 	ok( !jQuery('#nothiddendiv').is(':visible'), 'Modified CSS display: Assert element is hidden');
 	jQuery('#nothiddendiv').css("display", 'block');
 	ok( jQuery('#nothiddendiv').is(':visible'), 'Modified CSS display: Assert element is visible');
 
+	jQuery("#nothiddendiv").css("top", "-1em");
+	ok( jQuery("#nothiddendiv").css("top"), -16, "Check negative number in EMs." );
+
 	jQuery('#floatTest').css('styleFloat', 'left');
 	equals( jQuery('#floatTest').css('styleFloat'), 'left', 'Modified CSS float using "styleFloat": Assert float is left');
 	jQuery('#floatTest').css('cssFloat', 'right');
-- 
2.39.5