Client side JavaScript encompasses the core language plus extras such as the predefined objects, only relevant to running JavaScript in a browser.The client side java script is embedded directly in the HTML pages and is interpreted by the browser completely at the run time.Server side java script also encompasses the core language plus extas as the predefined objects and functions only relevant to running Javasript in a server.The serverside javascripts are compiled before they are deployed.

Client side validations will check presentation layer only.no need to go for business layer for validation purpose.Server side validation will check based on our technology.Mainly java script is used for client side validation purpose only.