What is JavaScript?
JavaScript is a dynamic programming language for web pages. HTML (a static code) provides code for the webpage itself, and JavaScript can make dynamic changes so you can see your account information without reloading the page. A page created in HTML is static, meaning it won’t change on-the-fly. JavaScript, however, is dynamic and therefore makes it easier and more convenient for your to retrieve your account information and use the features of our site. Today, JavaScript is used on most web sites.
JavaScript is a scripting language from Netscape that is only marginally related to the Java programming language. JavaScript is embedded as a small program in a web page that is interpreted and executed by the Web client. The time and nature of the execution is controlled by the scripter, and JavaScript functions can be called from within a Web document, often executed by mouse functions, buttons, or other actions from the user. JavaScript can be used to fully control the Netscape and MS Web browsers, including all the familiar browser attributes.
Javascript is a scripting language from Netscape that is only marginally related to Java. Java and JavaScript are not the same thing. JavaScript was designed to resemble Java, which in turn looks a lot like C and C++. The difference is that Java was built as a general-purpose object language, while JavaScript is intended to provide a quicker and simpler language for enhancing Web pages and servers.
JavaScript is a scripting language, meaning that it can be used to add nifty features that are more complex than basic HTML. Some common JavaScript features included pop-up windows, pictures that change when you mouse over them, and validation of form input. Note that JavaScript is different than Java. See the JavaScript Gallery for examples.