Server-side scripting means that all the script will be executed by the server and interpreted as needed. Client-side scripting means that the script will be executed immediately in the browser such as form field validation, clock, email validation, etc. Client-side scripting is usually done in VBScript or JavaScript. Since the code is included in the HTML page, anyone can see the code by viewing the page source. It also poses as a possible security hazard for the client computer.