In javascript, the word "this" refers to the ¢«Ê«_owner¢«Ê« of the function being executed. Put another way, "this" means the object that a function is a method of.
There is no systemout object in JavaScript. Do you mean Java?
This question doesn't make any sense. Do you mean who uses JavaScript? Or who created it? Or what JavaScript is useful for writing?
You can't make software, but you can make scripts that can be called from a program.
you probably mean java - download it free from http://java.com/en/ or you can enable javascript in your browser - go to http://wiki.answers.com/Q/How_can_you_activate_the_java_script_in_the_internet_browser
Basically that is telling you to enable javascript in your browser. Come back with your browser name and someone could tell you how to enable javascript in it.
A JavaScript tutorial contains instructions that will teach you how to code in JavaScript.
Java and JavaScript are different, and quite unrelated, languages. JavaScript is not "for Java"; basically you use JavaScript to create special effects on Web pages (HTML pages).
HTML, CSS, & JavaScript.
Javascript does not have classes
Javascript was created in 1995.
Javascript can help in browseing
Not sure what you mean by setting the javascript program as the background of your webpage, but if you mean that you want to incorporate some javascript functionality to your webpage like changing the html content when people click on an image or hover over some text, and you have not learned javascript yet, a good place to start is Lynda.com. You should also consider just learning jquery. Jquery is a much easier to learn and simpler to type code that employs the same functionality as javascript and much more. You can also learn how to write jquery on Lynda.com. You will just need to download their library or link to Google's version of it by placing one line of markup in your html document, then you create your javascript document and write your scripts in it.