Javascript
While surfing the web you probably encountered javascript, whether bij seeing nice looking menu's on a site or bij the confirmation dialog asking you if you want to accept the execution of the script. Javascript is a programming language, which allows sitebuilders to create applications on their site, to create applications not possible by using basic html.
This will make surfing the web visually more attractive, since some nice things can be done when using javascript like creating nice looking menus. But, since javascript is a programming language, creators can use any code in the applet, including malicious code. A few safety tips for surfing safe when encountering java applets:
- When the publisher cannot be verified, don't execute the script
- Configure your browser to deny unsigned javascript
- If you don't expect a java applet on the site, deny, and see what happens, sometimes you need to reload the page and axecute the script, but sometimes the site will work fine
You get problems using scripts the same way you get other malware, bad protection or unsafe surfing, to remove one, go here. And to prevent problems in the future go here.