javascript：

javascript的數(shù)據(jù)類型：

              基本數(shù)據(jù)類型：數(shù)值、字符串、布爾、空、undefined

注意：javascript中字符串是基本類型，傳遞的是值，不是地址。和java不同。

              轉(zhuǎn)義字符

              變量：字母、數(shù)字、下劃線、美元符$ ，以字母開(kāi)頭

javascript的函數(shù)：

function 函數(shù)名 (參數(shù)){
函數(shù)體；

              return 表達(dá)式；

}

              注意：函數(shù)由function定義。

              形參：javascript不要求實(shí)參和形參個(gè)數(shù)相等，可以通過(guò)使用function_name.arguments.length來(lái)得到傳過(guò)來(lái)的參數(shù)的個(gè)數(shù)。

              內(nèi)部函數(shù)：    encodeURI / decodeURI

                                   parseInt / pareFloat

                                   isNan 檢測(cè)parseInt / pareFloat的值是否是NaN

                                   escape / unescape 對(duì)一個(gè)字符串進(jìn)行編碼后的字符串

                                   eval 把一個(gè)字符串作為一個(gè)JavaScript表達(dá)式

javascript的對(duì)象：

              對(duì)象的屬性：不需要先定義，可以直接使用

              對(duì)象的方法：

                             定義：對(duì)象名.方法名 = 函數(shù)名

                             調(diào)用：對(duì)象名.方法名()

                             如：

                                   //定義了一個(gè)方法

                                          function sayname(){

                                                 alert(“name”);

                                          }

                                          object1.say=sayname;

                                          object1.say();

              對(duì)象的定義：

                            對(duì)象定義時(shí)，對(duì)象的屬性可以自己定義。

                            用for ( var prop in object) {}可以遍歷object里面的屬性

              內(nèi)部對(duì)象：    Object對(duì)象： new Object() 新建一個(gè)對(duì)象

                                  String對(duì)象：

                                                        屬性：    length

                                                        方法：    indexOf() / lastIndexOf()

                                                                     match(正則表達(dá)式)

                                                                      正則表達(dá)式：

                                                                                    以/ …. /作為標(biāo)志

                                                                                    使用test()方法，符合條件返回true

                                                                      replace() 替換第一次出現(xiàn)的字符

                                                                      split() 返回一個(gè)數(shù)組

                                                                      substring() 截位置 / substr() 截長(zhǎng)度

                                   Math對(duì)象：   Math對(duì)象是靜態(tài)對(duì)象，需要用Math.方法名()調(diào)用

                                   Date對(duì)象：   new Date() 構(gòu)造方法

                                                        getYear() / getMonth()+1 / getDate() / getDay/ getTime()

                                   toString方法：     toString()可以轉(zhuǎn)換進(jìn)制 如toString(2);

數(shù)組：    var arr = new Array();

              同一個(gè)數(shù)組中可以加不同類型的值。數(shù)組的長(zhǎng)度可變。

javascript的局部變量建立后，可以在整個(gè)函數(shù)體內(nèi)中的任何地方使用。

事件驅(qū)動(dòng)(通用)： onClick();

                            onChange()： text / textarea 輸入字符時(shí)

                                                 select 中選項(xiàng)改變時(shí)

                            onSelect()：   text / textarea 中文字被選中時(shí)

                            onFocus() / onBlur 獲得 / 失去 焦點(diǎn)

                            onLoad() / onUnload();

document對(duì)象：  

方法：

              write() / writeln() 使用后要用 close() 關(guān)閉

              getElementById / getElementsByName 得到元素

              createElement()

包含對(duì)象：

              forms數(shù)組 得到<form></form>對(duì)象

              links數(shù)組 得到<a href=””></a>對(duì)象

              anchors數(shù)組 得到<a name=””></a>對(duì)象

              all數(shù)組 得到所有對(duì)象

body對(duì)象：          事件：

                                          onselectstart  =”return false” 時(shí)就不能選擇網(wǎng)頁(yè)上的東西了

                                          onscroll

                            包含對(duì)象：

                                          all

                                          style

form對(duì)象：          方法：   submit()

                                          reset()

                            事件：    onsubmit   函數(shù)體內(nèi) return true or false 判斷是否提交表單

                            包含對(duì)象：

                                          text / textarea / select / checkbox / radio：

                                                        方法：    blur / focus

                                                                      click

                                                                      add (select 用)

                                                        屬性：    disabled / readOnly

                                                                      value

                                                                      checked

                                                        select特殊的屬性：

                                                                      multiple 是否可以復(fù)選

                                                                      selectedIndex 選擇的Index

                                                                      options 返回options數(shù)組

                                                        option屬性

                                                                      text / value

                                                                      selected

                                                                      index

                                                        事件：   onChange

                                                                      onSelect

                                                                      onFocus

                                                                      onBlur

window對(duì)象：      方法：    alert() / prompt() / confirm() ：

                                                               prompt()返回的是值 / confirm()返回 true/false

                                          open() / close()

                                          setInterval() / setTimeout()   對(duì)應(yīng) clearInterval / clearTimeout

                                          moveTo / resizeTo

                                          showModalDialog() / showModalessDialog()

                                                        showModalDialog()中可以用第二個(gè)參數(shù)向?qū)υ捒騻髦?/SPAN>

                                                        對(duì)話框可以用returnValue返回值

                            事件：    onresize事件

                            對(duì)象：    location：地址欄對(duì)象，可以得到地址欄或者改變網(wǎng)頁(yè)

                                                        刷新：reload()

                                          event：得到事件源

                                          frames：數(shù)組

                                          screen：提供顯示器信息

                                          history： go(0 / -1)  / back() /     forward()

                                          navigator：瀏覽器信息