Javascript is a kind of lightweight programming language, interpreted by most browsers and that provides web pages with effects and functions that are complementary to those considered standard HTML This type of programming language is often used on sites web, to perform actions on the client side, being focused on the source code of the web page.
Javascript was created by the software company "Netscape Corporation" to be placed in your browser 2.0 and thanks to its simplicity, it still continues to be one of the very useful tools for creating web pages that have more than text.
Another of the companies that developed Java Script was Microsoft, for its Explorer, which is generally similar to Netscape.
It is important to be clear that Javascript is not entirely a programming language, but rather a script language (routines or scripts). Therefore, it is more like macros in spreadsheet or word processors. It would be impossible to run a complete program with Javascript.
Java Script helps to improve client / server management; Its basic functions include: opening and closing windows; effective changes to a page (in terms of content and appearance; development of text strings; arithmetic procedures.
Since its mission is to extend HTML, Java Script is a language that contemplates certain restrictions, which indirectly end up providing security to the user.
