Client-side scripting: javascript

Client-side scripting generally refers to the class of computer programs on the web that are executed client-side , by the user's web browser , instead of server-side (on the web server ).
This type of computer programming is an important part of the Dynamic HTML (DHTML) concept, enabling web pages to be scripted ; that is, to have different and changing content depending on user input, environmental conditions (such as the time of day), or other variables.