| Quick links About JavaScript
JavaScripts
Programming definitions ABOUT JAVASCRIPT See our JavaScript definition for a complete definition and basic overview of the JavaScript programming language. JavaScript Security - Because JavaScript is downloaded from an unknown origin and executed on your computer, JavaScript has the potential of being a virus or doing other malicious things to your computer. To address this issue, Sun implemented tight security features from the earlier stages of Java development. These features include verification of byte codes (to ensure they don't violate access restrictions and more), as well as configurable network security that ranges from disabling network access to limiting access by an applet only to the host where the code originated, all
the way to completely free network access. | 
