There are 3 ways to define an array in JavaScript a) Conventional array Conventional array looks like var mycars=new Array() mycars[0]="Toyota" mycars[1]="Honda" mycars[2]="Mitsubishi" You can expand and contract the array as desired, by adding new array elements with first array element should have an index number of 0. With a conventional array, you have choice of presetting the array's length when defining it, by passing in a numeric integer into the Array() constructor: var mycars=new Array(3) In this case 3 array elements will automatically be created, each with a value still "undefined." Also mycars.length will return 3. b) Condensed array The second way to define an array is called a Condensed array; it differs from Conventional array as it allows you to combine the array and array elements definitions into one step: var mycars=new Array("Toyota", "Honda", "Mitsubishi") This is suitable if you know all the array element values beforehand. c) Literal arrays The third way to define an array is called Literal array. Introduced in JavaScript1.2.

The search giant is not satisfied with Chrome browser and Android but goes a step further in creating a Google Chrome OS. Google Chrome OS will be an open source, lightweight operating system that will initially be targeted at netbooks. Google Chrome OS will be available for consumers in the second half of 2010. Google Chrome Operating System is Linux Kernel with Chrome to fit happily with x86 and ARM processor pc. Speed, simplicity and security will be the key features of Google Chrome OS. The OS is fast and lightweight, to start up and get you onto the web in a few seconds. The user interface is minimal and mainly user experience is web related hence underlying security architecture of the OS is so designed that users don't have to deal with viruses, malware and security updates. For application developers, all web-based applications will work and new applications can be written using available web technologies. These apps will run not only on Google Chrome OS, but on any standards-based browser on Windows, Mac and Linux thus give developers the largest user base of any platform.