Client side scripting languages are useful to validate the inputs or user actions from user side or client side.
Client side scripting is good because it won’t send the unwanted input’s to server for validation. From front-end it self it validate the user inputs and restricts the user activities and guides him
Server side Scripting languages are
Perl, JSP, ASP, PHP.etc
Server side Scripting languages are to validate the inputs at server side.
These scripting languages provide security for the application. And also provides dynamic nature to web or client server application