JavaScript语法学习笔记

我搞j2ee属于半路出家,没有系统学习过,大多功能是会用,但讲不出道道,不成体系.

在jsp文件中常使用jquery,对javascript属于现学现用.

看到的朋友有任何意见和建议请多提

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共包含日期格式, url提取及分解,对象三部分内容

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JavaScript语法</title>


</head>
<script type="text/javascript">
<!--
var thisDate = new Date();
/*日期格式*/
document.writeln(thisDate.toString());
document.writeln("<br/>");
document.write(thisDate.getFullYear() + "-" + thisDate.getMonth() + "-" + thisDate.getDay());
document.writeln(" ");
document.writeln(thisDate.getHours() + ":" + thisDate.getMinutes() + ":" + thisDate.getSeconds() + "." + thisDate.getMilliseconds() );
/*URL分解*/
document.write("<hr/>");
//设定一个带有参数的URL 如:    file:///E:/Documents%20and%20Settings/simon/%E6%A1%8C%E9%9D%A2/Untitled-1.html?aa=11&bb=cc
var url = document.URL.split("?");
var param = url[1].split("&");
for(i = 0; i < param.length; i++){
    var val = param[i].split("=");
    document.write(val[0] + "=" + val[1]);
    document.write("<br/>");
}

//打开新document对象
document.write("<hr/>");
document.write("<input type='button' value='New document' onclick='newDocument()'/>");
function newDocument(){
    document.open();
    document.write("New Document");
    window.setTimeout(window.close(), "3000");
}

//网页加载进度窗口, 页面没有内容时刷的太快, 可以通过onload控制.
//var placeHolder2 = document.open('Untitled-2.html','test','width=300,height=300');


//Javascript对象
/*对象
    属性可以在对象内定义,如name,age;也可以在对象外定义,如addr
    方法分两种方式定义,见say和ageAdd的定义
*/
function Person(){
    this.name = 'aa';
    this.age = 12;
    this.say = sayPerson;
    this.ageAdd=function(){
        this.age++;
    }
}
function sayPerson(){
    alert(this.name + "," + this.age + "," + this.addr);
}
function newP(){
    var p = new Person();
    p.addr = "abcd";
    p.say();
    p.ageAdd();
    p.say();
}

//对象2 简单的自定义对象内部函数
function cHuman(){
    function sayHuman(attr){
        return human[attr];
    }
    var human = new Object();
    human.userName = "abc";
    human.userAge = 12;
    alert(sayHuman("userAge"));
    alert(sayHuman("userName"));
}

//对象3
function Simon(){this.userName; this.userAge;}
//Simon.prototype.userName = "";
Simon.prototype.setUserName = function(userName){this.userName = userName;}
Simon.prototype.getUserName = function(){return this.userName;}
Simon.prototype.setUserAge = function(userAge){this.userAge = userAge;}
Simon.prototype.getUserAge = function(){return this.userAge;}
function cSimon(){
    var simon = new Simon();
    simon.setUserName("Simon hahah ");
    simon.setUserAge(22);
    alert(simon.getUserName() + " " + simon.getUserAge());
    with(simon){//with的用法
        alert(getUserName() + ", " + getUserAge());
    }
    var p, str = "";
    for(p in simon){
        str +=p + "\n";
    }
    alert(str);
}

//对象4
function cObj(){
    function Obj(){this.userName = "aa"; this.userAge = 55;}
    var obj = new Obj();
    var p, str = "";
    for(p in obj){//for的用法
        str +=p + "=" + obj[p] + "\n";
    }
    alert(str);
}

//对象5 数组对象
function MyArr(){
    this.length = arguments.length;
    for(i = 0; i < this.length; i++){
        this[i] = arguments[i];
    }
}
function cMyArr(){
    var myArr = new MyArr("abc", 12, '你好', 3.5, true);
    var str = "";
    for(i = 0; i < myArr.length; i++){
        str += myArr[i] + ", ";
    }
    alert(str);

    var p;
    str = "";
    for(p in myArr){
        str += p + "=" + myArr[p] + "\n";
    }
    alert(str);
}

//对象6 数组对象
function MyArr2(size){
    this.length = size;
    for(i = 0; i < this.length; i++){
        this[i] = "";
    }
}
function cMyArr2(){
    var myArr2 = new MyArr2(6);

    myArr2[0] = "aa";
    myArr2[1] = 3;
    myArr2[2] = '

补充：web前端 , JavaScript ,