Opera doesn't give height/width of display: none elements with getComputedStyle but does with currentStyle - fall back to that if it exists.

Author: jeresig

src/css.js

@@ -12,8 +12,8 @@ var ralpha = /alpha\([^)]*\)/i,
 	cssHeight = [ "Top", "Bottom" ],
 	curCSS,
 
-	// cache check for defaultView.getComputedStyle
-	getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
+	getComputedStyle,
+	currentStyle,
 
 	fcamelCase = function( all, letter ) {
 		return letter.toUpperCase();
@@ -172,6 +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 ) {
 						return val;
 					}
@@ -231,8 +235,8 @@ if ( !jQuery.support.opacity ) {
 	};
 }
 
-if ( getComputedStyle ) {
-	curCSS = function( elem, newName, name ) {
+if ( document.defaultView && document.defaultView.getComputedStyle ) {
+	getComputedStyle = function( elem, newName, name ) {
 		var ret, defaultView, computedStyle;
 
 		name = name.replace( rupper, "-$1" ).toLowerCase();
@@ -250,9 +254,10 @@ if ( getComputedStyle ) {
 
 		return ret === "" ? "auto" : ret;
 	};
+}
 
-} else if ( document.documentElement.currentStyle ) {
-	curCSS = function( elem, name ) {
+if ( document.documentElement.currentStyle ) {
+	currentStyle = function( elem, name ) {
 		var left, rsLeft, ret = elem.currentStyle && elem.currentStyle[ name ], style = elem.style;
 
 		// From the awesome hack by Dean Edwards
@@ -279,6 +284,8 @@ if ( getComputedStyle ) {
 	};
 }
 
+curCSS = getComputedStyle || currentStyle;
+
 function getWH( elem, name, extra ) {
 	var which = name === "width" ? cssWidth : cssHeight,
 		val = name === "width" ? elem.offsetWidth : elem.offsetHeight;