JavaScript
JS is another term used when describing the programming language designed by the Netscape Company; also known as javascript. This language, which is a compilation of both symbols and numbers, is used to allow the performance of certain functions on a website. The language is written into a website’s HTML code, which allows a specific action to be initiated when a certain action is performed by a website user.
There are different types of JS that perform different functions. Different types of javascript are created when it is combined with other languages, such as when cascading style sheets are combined with javascript to form CSS javascript. The new combination is able to create bold effects when used in dynamic HTML active scripting. A second example of this is PHP javascript; when javascript is combined with a hypertext preprocessor script. The disadvantage of this type is that the javascript leaves no room for error, and will only be displayed correctly if all information is input correctly.
When an Internet user makes their way around the internet by clicking links and interacting with the information on different pages, menus written in JS are triggered. Websites utilize javascript to allow clickable links to open up new pages to show information. While this is a very common use for javascript, it is not the only one. Javascript is also used to make images and text appear when the user rolls their mouse over certain areas of web pages. Another action that javascript is used for is to initiate the activation of annoying popups.
Javascript can be disabled as part of a pop up killer program to block popups from opening in new windows. Disabling JS for this purpose is also often successful in preventing infected popups from accidentally being downloaded to the user’s computer. A new trend called click-jacking involves the use of javascript to cause unaware Internet users to download spyware and viruses to their computer. In this use of javascript, specific viruses are scripted into the HTML code of a pop up ad, and when the “x” button is pressed a virus is downloaded onto the user’s computer, in addition to closing the popup.
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