+ } else {
+ return value;
+ }
+ }
+ };
+});
+
+if ( !jQuery.support.opacity ) {
+ jQuery.cssHooks.opacity = {
+ get: function( elem, computed ) {
+ // IE uses filters for opacity
+ return ropacity.test((computed && elem.currentStyle ? elem.currentStyle.filter : elem.style.filter) || "") ?
+ (parseFloat(RegExp.$1) / 100) + "" :
+ computed ? "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 = jQuery.isNaN(value) ?
+ "" :
+ "alpha(opacity=" + value * 100 + ")",
+ filter = style.filter || "";
+
+ style.filter = ralpha.test(filter) ?
+ filter.replace(ralpha, opacity) :
+ style.filter + ' ' + opacity;
+ }
+ };
+}