JavaScript基础应用
JavaScript就这么回事1：基础知识
1 创建脚本块
1: <script language=”JavaScript”>
2: JavaScript code goes here
3: </script>
2 隐藏脚本代码
1: <script language=”JavaScript”>
2: <!--
3: document.write(“Hello”);
4: // -->
5: </script>
在不支持JavaScript的浏览器中将不执行相关代码
3 浏览器不支持的时候显示
1: <noscript>
2: Hello to the non-JavaScript browser.
3: </noscript>
4 链接外部脚本文件
1: <script language=”JavaScript” src="/”filename.js"”></script>
5 注释脚本
1: // This is a comment
2: document.write(“Hello”); // This is a comment
3: /*
4: All of this
5: is a comment
6: */
6 输出到浏览器
1: document.write(“<strong>Hello</strong>”);
7 定义变量
1: var myVariable = “some value”;
8 字符串相加
1: var myString = “String1” + “String2”;
9 字符串搜索
1: <script language=”JavaScript”>
2: <!--
3: var myVariable = “Hello there”;
4: var therePlace = myVariable.search(“there”);
5: document.write(therePlace);
6: // -->
7: </script>
10 字符串替换
1: thisVar.replace(“Monday”,”Friday”);
11 格式化字串
1: <script language=”JavaScript”>
2: <!--
3: var myVariable = “Hello there”;
4: document.write(myVariable.big() + “<br>”);
5: document.write(myVariable.blink() + “<br>”);
6: document.write(myVariable.bold() + “<br>”);
7: document.write(myVariable.fixed() + “<br>”);
8: document.write(myVariable.fontcolor(“red”) + “<br>”);
9: document.write(myVariable.fontsize(“18pt”) + “<br>”);
10: document.write(myVariable.italics() + “<br>”);
11: document.write(myVariable.small() + “<br>”);
12: do
相关文档：
本文来自http://q.yesky.com/group/review-17634017.html，另外还添加一些里面技术的链接。
离线事件(Online and offline events):
https://developer.mozilla.org/En/Online_and_offline_events
https://bug336359.bugzilla.mozilla.org/attachment.cgi?id=220609
http://ejohn.org/blog/offline-events/
postMessage ......
在开发过程中经常遇到要调整小数的格式，如保留小数点后两位等等。方法也颇为常见，备忘如下。
第一种，利用math.round
var original=28.453
1) //round "original" to two decimals
var result=Math.round(original*100)/100; //returns 28.45
2) // round "original" to 1 dec ......
引用是一个指向对象实际位置的指针。
例1：
var obj = new Object();
var objRef = obj; //obj与objRef指向同一个对象,objRef是一个引用
自修改（self-modifying）
例2：
var items = new Array("one","two","three");
var itemsRef = items; //创建一个引用
items.push("four");
alert(items.length == items ......
getkey 用于获得按键的相应代码, getev用于获得响应事件
<script>
function getkey(e)
{
var key;
if(document.all)
{
......
insertAtCurson 函数代两参数分别为对象和输入的字符
function insertAtCursor(myField, myValue)
{
if (document.selection)
{
&nb ......
