What can a JavaScript do?
JavaScript gives HTML designers a programming tool - HTML authors are normally not programmers, but JavaScript is a scripting language with a very simple syntax! Almost anyone can put small "snippets" of code into their HTML pages
JavaScript can put dynamic text into an HTML page - A JavaScript statement like this: document.write("<h1>" + name + "</h1>") can write a variable text into an HTML page
JavaScript can react to events - A JavaScript can be set to execute when something happens, like when a page has finished loading or when a user clicks on an HTML element
JavaScript can read and write HTML elements - A JavaScript can read and change the content of an HTML element
JavaScript can be used to validate data - A JavaScript can be used to validate form data before it is submitted to a server. This saves the server from extra processing
JavaScript can be used to detect the visitor's browser - A JavaScript can be used to detect the visitor's browser, and - depending on the browser - load another page specifically designed for that browser
JavaScript can be used to create cookies - A JavaScript can be used to store and retrieve information on the visitor's computer
Source link: http://www.w3schools.com/js/default.asp
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上回说到，操作Object Array
其实还可以这样操作：
var Room = [
{
ID: 'bot',
name: 'test' ......
<!doctype html>
<html lang="zh-ch">
<head>
<meta charset="utf-8" />
<meta content="IE=8" http-equiv="X-UA-Compatible"/>
<title>mousewheel的事件绑定 by 司徒正美</title>
<mce:script type="text/javascript"><!--
window. ......
JavaScript 的成功让人津津乐道，为 Web 网页编写 JavaScript 代码已经是所有 Web 设计师的基本功，这门有趣的语言蕴藏着许多不为人熟知的东西，即使多年的 JavaScript 程序员，也未能完全吃透。本文从7个方面讲述 JavaScript 中那些你不很熟知但非常实用的技巧。
简略语句
JavaScript 可以使用简略语句快速创建对象和数� ......
var vKeyCode= e.getKeyCode();
if (vKeyCode >= 65 && vKeyCode <= 90 ) // Caps Lock 打开
{
......
<html>
<head>
<mce:script type = "text/javascript"><!--
function changetext()
{
var x = document.getElementById("list");
for (var i = 0;i < x.length;i++ )
{
if (x.options[i].selected)
{
document.getElemen ......
