Making Ajax calls to a controller action

Ajax calls can also be made to a Controller action in ASP.NET MVC applications. In this example, let's post a request to the controller action from a View. The constructs used in this example are summarized in the following table:

Construct	Type	Description
$("#identifier")	jQuery selector	This selects an element based on its ID.
$.ajax()	jQuery function	This posts an Ajax request to the server with the set options.
change	jQuery event	This is fired when the value of an element changes. It corresponds to the JavaScript change event.
.on()	jQuery event binder	This attaches an event handler for one or more events to the matched elements.
.text()	jQuery method	This returns the combined text content of each of the matched elements or sets the text content of every matched element.
.trim()	JavaScript function	This removes whitespaces from the beginning and end of a string.
.val()	jQuery method	This returns the value...