JavaScript local alias pattern
Here’s a little pattern that is fairly common from JavaScript developers but that is not very well known from C# developers or people doing only occasional JavaScript development. In C#, you can use a “using” directive to create aliases of namespaces or bring them to the global scope: namespace Fluent.IO { using System; using System.Collections; using SystemIO = System.IO; In JavaScript, the only scoping construct there is is the function, but it can also be used as a local aliasing device, just like the above using directive: ( function ($, dv) { $( "#foo" ).doSomething(); var a = new dv( "#bar" ); })(jQuery, Sys.UI.DataView); This piece of code is making the jQuery object accessible using the $ alias throughout the code
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Read the complete post at http://weblogs.asp.net/bleroy/archive/2010/05/17/javascript-local-alias-pattern.aspx