+ cssHooks: {
+ opacity: {
+ get: function( elem ) {
+ // We should always get a number back from opacity
+ var ret = curCSS( elem, "opacity", "opacity" );
+ return ret === "" ? "1" : ret;
+ }
+ }
+ },
+
+ // exclude the following css properties to add px
+ cssNumber: {
+ "zIndex": true,
+ "fontWeight": true,
+ "opacity": true,
+ "zoom": true,
+ "lineHeight": true
+ },
+
+ cssProps: {
+ // normalize float css property
+ "float": jQuery.support.cssFloat ? "cssFloat" : "styleFloat"
+ },
+
+ css: function( elem, name, value, force, extra ) {