JavaScript is an object-oriented scripting language used in web pages. It was originally developed by Netscape Communications under the name "Mocha" and then "LiveScript" but then renamed to "JavaScript" and given a syntax closer to that of Sun Microsystems' Java language. JavaScript was later standardized by ECMA under the name ECMAScript. The current standard (as of December 1999) is ECMA-262 Edition 3, and corresponds to JavaScript 1.5. Microsoft calls their version JScript.