AJAX Chart
Ajax is a set of Web development techniques using many Web technologies on the client side to create asynchronous Web applications. With Ajax, Web applications can send and retrieve data from a server asynchronously (in the background) without interfering with the display and behavior of the existing page. Ajax allows changing content dynamically without the need to reload the entire page. It can be used while presenting charts or maps, thus, when a user is working with a chart by clicking some elements or even changing their colors or data, the web page is not reloading.