X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fcore.js;h=3389e83f79c5979dd48122cb16b6e328476893ff;hb=0be7f4eb4f027dce00f11d7816290022d447d336;hp=cc921385d939141b02320050851ea0cf4b78dfa5;hpb=e0a9615f82fcdad73de6db42a995eb2a5550e361;p=jquery.git

diff --git a/src/core.js b/src/core.js
index cc92138..3389e83 100644
--- 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 ) :