Make sure that opacity is being reset properly on a show animation. Additionally...

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index cc92138..3389e83 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -33,6 +33,9 @@ var jQuery = function( selector, context ) {
        // Check for non-word characters
        rnonword = /\W/,
 
+       // Check for digits
+       rdigit = /\d/,
+
        // Match a standalone tag
        rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,
 
@@ -488,6 +491,10 @@ jQuery.extend({
                return obj && typeof obj === "object" && "setInterval" in obj;
        },
 
+       isNaN: function( obj ) {
+               return obj == null || !rdigit.test( obj ) || isNaN( obj );
+       },
+
        type: function( obj ) {
                return obj == null ?
                        String( obj ) :