Beginning Web Development, Silverlight, and ASP.NET AJAX

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CHAPTER 14 ■ JAVASCRIPT PROGRAMMING WITH ASP.NET AJAX
Error.notImplemented: This allows you to create an error that declares that the desired
piece of functionality has not been implemented.
Error.parameterCount: This allows you to create an error that defines that the parameter
set passed to the function is incorrect.
Number Type Extensions
These extend the base JavaScript Number object with some new static and instance
methods.
Formatting a Number
You can format a number using the format function. This uses a culture-independent
value, based on the en-US culture. For example, if you want to format a number as a currency
(c format), you can use the following:
var a = 20;
var v = a.format("c");
To use the current culture to format the number, you can use the localeFormat function.
This formats the number based on the current system locale. To understand how to
configure this, you should check out the ASP.NET documentation on globalization and
localization. The script to format the number according to the current culture is identical:
var a = 20;
var v = a.localeFormat("c");
Parsing a Number
You can create a new number var by parsing a string value. This is a static function and
can be called without creating an instance of the object:
var n = Number.parseInvariant("23.2");
Additionally, you can parse a localized string to get a number using the parseLocale
function, like this:
var n = Number.parseLocale("23,2");