Information about JavaScript      JavaScript is a programming language that can be embedded in HTML (Hyper Text Markup Language), the programming language that web pages are made with. Because JavaScript is embedded in the HTML, it is executed on the "Client Side". It doesn't require any action from the web page host. All of the actions are performed by the browser software. This means that there are fewer transmissions across the net. Therefore it usually executes faster when the net is under heavy use.       Because JavaScript is executed by the browser software there is a compatibility problem. You must be using a browser that executes JavaScript. There is also a problem with the version of JavaScript that the browser can execute. This is usually solved by determining what type of browser the client is using and making several versions of the script for different browsers.       The addition of JavaScript to a web page can perform a variety of functions. Portions of the JavaScript program are usually triggered into action when based on a mouse click or when the mouse goes over a hot point. It can be used to: Calculate a variety of items, such as sales tax. Load different images. Load different web pages. Verify Forms input.      In general it can do almost anything that the person browsing the web page can do but under program control.