1 files changed, 22 insertions, 7 deletions

diff --git a/src/css.js b/src/css.js
index a6e2bb614..19c6342d2 100644
--- a/src/css.js
+++ b/src/css.js
@@ -12,6 +12,9 @@ var ralpha = /alpha\([^)]*\)/i,
 	cssHeight = [ "Top", "Bottom" ],
 	curCSS,
 
+	getComputedStyle,
+	currentStyle,
+
 	fcamelCase = function( all, letter ) {
 		return letter.toUpperCase();
 	};
@@ -169,6 +172,10 @@ jQuery.each(["height", "width"], function( i, name ) {
 				if ( val <= 0 ) {
 					val = curCSS( elem, name, name );
 
+					if ( val === "0px" && currentStyle ) {
+						val = currentStyle( elem, name, name );
+					}
+
 					if ( val != null ) {
 						// Should return "auto" instead of 0, use 0 for
 						// temporary backwards-compat
@@ -234,7 +241,7 @@ if ( !jQuery.support.opacity ) {
 }
 
 if ( document.defaultView && document.defaultView.getComputedStyle ) {
-	curCSS = function( elem, newName, name ) {
+	getComputedStyle = function( elem, newName, name ) {
 		var ret, defaultView, computedStyle;
 
 		name = name.replace( rupper, "-$1" ).toLowerCase();
@@ -252,10 +259,13 @@ if ( document.defaultView && document.defaultView.getComputedStyle ) {
 
 		return ret;
 	};
-} else if ( document.documentElement.currentStyle ) {
-	curCSS = function( elem, name ) {
-		var left, rsLeft,
+}
+
+if ( document.documentElement.currentStyle ) {
+	currentStyle = function( elem, name ) {
+		var left, 
 			ret = elem.currentStyle && elem.currentStyle[ name ],
+			rsLeft = elem.runtimeStyle && elem.runtimeStyle[ name ],
 			style = elem.style;
 
 		// From the awesome hack by Dean Edwards
@@ -266,22 +276,27 @@ if ( document.defaultView && document.defaultView.getComputedStyle ) {
 		if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
 			// Remember the original values
 			left = style.left;
-			rsLeft = elem.runtimeStyle.left;
 
 			// Put in the new values to get a computed value out
-			elem.runtimeStyle.left = elem.currentStyle.left;
+			if ( rsLeft ) {
+				elem.runtimeStyle.left = elem.currentStyle.left;
+			}
 			style.left = name === "fontSize" ? "1em" : (ret || 0);
 			ret = style.pixelLeft + "px";
 
 			// Revert the changed values
 			style.left = left;
-			elem.runtimeStyle.left = rsLeft;
+			if ( rsLeft ) {
+				elem.runtimeStyle.left = rsLeft;
+			}
 		}
 
 		return ret === "" ? "auto" : ret;
 	};
 }
 
+curCSS = getComputedStyle || currentStyle;
+
 function getWH( elem, name, extra ) {
 	var which = name === "width" ? cssWidth : cssHeight,
 		val = name === "width" ? elem.offsetWidth : elem.offsetHeight;