+ // JSON RegExp
+ rvalidchars = /^[\],:{}\s]*$/,
+ rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
+ rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
+ rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
+
+ // Useragent RegExp
+ rwebkit = /(webkit)[ \/]([\w.]+)/,
+ ropera = /(opera)(?:.*version)?[ \/]([\w.]+)/,
+ rmsie = /(msie) ([\w.]+)/,
+ rmozilla = /(mozilla)(?:.*? rv:([\w.]+))?/,
+