1. History of JavaScript
JavaScript was first introduced by Netscape in 1995. At first the language that is now called JavaScript was once named "LiveScript" which serves as a simple language for the browser Netscape Navigator 2 is very popular at the time. Then, in line with being jealous of cooperation between Netscape and Sun (the developer programming language "Java") at that time, then Netscape gave the name "JavaScript" to the language on 4 December 1995.
At the same time Microsoft has tried to adapt this technology that they refer to as "JScript" in their own browser is Internet Explorer 3. JavaScript itself is a modification of the C + + programming language with pattern writing simpler than C + + programming language.
2. Understanding JavaScript
JavaScript is a prototype-based programming language that runs client side. If we are talking in the context of Web, quite simply, we can understand JavaScript as a programming language that runs exclusively for dibrowser or web pages to web pages come alive. When viewed from the syllables composed of two syllables, namely Java and Script. Java is an object-oriented programming language, while the script is a set of program instructions.
Javascript is a scripting language used to create web applications, client-side nature so that it can be processed directly in the browser without having to connect first Upload. Despite its name the word "Java", Javascript is not related to the Java programming language, although both have similarities in terms of language syntax that mimics C.
Original name of this language is LiveScript which later changed because of the cooperation agreement between Netscape and Sun to reply to bundle Netscape allows browse them using Java and Sun. "JavaScript" is a registered trademark of Sun Microsystems, Inc. and licensed by Sun to Netscape Comunications and other entities such as the Mozilla Foundation.
3. Usability JavaScript
The primary use of JavaScript is to write functions that feed into either HTML or placed directly pasted into a text file and in links from HTML documents.
Functionally, JavaScript is used to provide access to objects embedded scripts (embedded). A simple example of the use of JavaScript is opening a pop-up page, the form validation function before the data is sent to the server, change the cursor image when passing through certain objects, and others.