+if ( !jQuery.support.opacity ) {
+ jQuery.cssHooks.opacity = {
+ get: function( elem, force ) {
+ // IE uses filters for opacity
+ return ropacity.test(elem.currentStyle.filter || "") ?
+ (parseFloat(RegExp.$1) / 100) + "" :
+ "1";
+ },
+
+ set: function( elem, value ) {
+ var style = elem.style;
+
+ // IE has trouble with opacity if it does not have layout
+ // Force it by setting the zoom level
+ style.zoom = 1;
+
+ // Set the alpha filter to set the opacity
+ var opacity = parseInt( value, 10 ) + "" === "NaN" ?
+ "" :
+ "alpha(opacity=" + value * 100 + ")";
+
+ var filter = style.filter || jQuery.curCSS( elem, "filter" ) || "";
+
+ style.filter = ralpha.test(filter) ?
+ filter.replace(ralpha, opacity) :
+ opacity;
+ }
+ };
+}
+
+if ( getComputedStyle ) {
+ curCSS = function( elem, name ) {
+ var ret, defaultView, computedStyle;
+
+ // Only "float" is needed here
+ if ( rfloat.test( name ) ) {
+ name = "float";
+ }
+
+ name = name.replace( rupper, "-$1" ).toLowerCase();
+
+ if ( !(defaultView = elem.ownerDocument.defaultView) ) {
+ return null;
+ }
+
+ if ( (computedStyle = defaultView.getComputedStyle( elem, null )) ) {
+ ret = computedStyle.getPropertyValue( name );
+ }
+
+ // We should always get a number back from opacity
+ if ( name === "opacity" && ret === "" ) {
+ ret = "1";
+ }
+
+ return ret;
+ };
+
+} else if ( document.documentElement.currentStyle ) {
+ curCSS = function( elem, name ) {
+ var left, rsLeft, camelCase = name.replace(rdashAlpha, fcamelCase),
+ ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
+
+ // From the awesome hack by Dean Edwards
+ // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
+
+ // If we're not dealing with a regular pixel number
+ // but a number that has a weird ending, we need to convert it to pixels
+ 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;
+ style.left = camelCase === "fontSize" ? "1em" : (ret || 0);
+ ret = style.pixelLeft + "px";
+
+ // Revert the changed values
+ style.left = left;
+ elem.runtimeStyle.left = rsLeft;
+ }
+
+ return ret;
+ };
+}
+