ABSTRACT
Scripting languages are essential to the development of Web applications. Although simple Websites that offer just links between pages can be accomplished with just HyperText Markup Language (HTML) and Cascading style Sheets (CSS), complex sites that require interactivity as well as data to be processed and stored require the use of scripting languages. Like CSS, scripts can be embedded in HTML code or written in a separate file to which the HTML can be linked. Client-side scripting was developed to prevent the Web browser from having to contact the Web server each time a user performs an action on a page. The way the data that are sent to the Web browser by the Web server is displayed is to replace the whole of the current page with a new one containing the sent data.
