Introduction: Javascript is a scripting language, primarily designed to add interactivity to web pages and web applications. It was developed by Brendan Eich, the language was first implemented by Netscape Communications Crop in 1995. JavaScript was originally developed under the name Mocha, later called LIVESCRIPT. But, changed to Javascript when it was released in Netscape browser vwesion 2.0B3, as a marketing ploy by Sun Microsystems and Netscape. Javascript is totally different from Java languages, but the naming rules are quite similar. Client-side Java scripts can be embedded directly into HTML web pages. While battling Microsoft on the web, Netscape offered its own client-side script on a distributed operating system, running a portable version of Sun Microsystems' Java, because Java was a direct competitor to C++, aimed at professional developers. Netscape wanted a lightweight programming language that could complement Java while appealing to non-professional developers like Microsoft's Visual Basic. Before jQuery was developed, web developers created their own custom frameworks in Javascript. This allowed them to work around specific bugs and reduces the time needed to work with common bugs. This led to a group of developers creating their own custom libraries and these were open source and free to use. jQuery is a cross-platform Javascript library designed to simplify client-side scripting of HTML. It was developed by a team of developers led by Dave Methvin. It was released in January 2006 at BarCamp in New York by John Resig. Over 10,000 most visited web pages, 80% of web pages were developed using jQuery. Nowadays jQuery is the most popular Javascript library in use.JavaScript:JavaScript is a dynamic com...... middle of paper......To use an external script, enter the name of the script file in the source ( src) of the tag. You can insert an external script inside or tag as you like. Example My Web Page One Paragraph Try It Dynamic Content: Dynamic content is the hottest topic in web development right now. Dynamic content refers to content that constantly changes and adapts to specific users whenever possible. For example, JavaScript can be used to determine whether a website visitor is using a computer or a mobile device before deciding whether or not to view the mobile version of the website. It's these little things behind the scenes that create real value in using JavaScript to create dynamic web pages.