JS的一些实用小例子

1、检查浏览器及版本

function browserVersion(){

//浏览器名称

var browser = navigator.appName;

//浏览器版本

var version = navigator.appVersion;

alert(browser + ";" + version);

}

2、检查浏览器更多信息

function browserVersion(){

//浏览器

var browser = navigator.appName;

//浏览器版本

var version = navigator.appVersion;

//代码

var appCodeName = navigator.appCodeName;

//平台

var platform = navigator.platform;

//启用

var cookieEnabled = navigator.cookieEnabled;

//浏览器的用户代理报头

var userAgent = navigator.userAgent;

}

3、创建对象的实例

function showObject(){

personObj = new Object();

personObj.firstname = "John";

personObj.lastname = "Adams";

personObj.age = 35;

personObj.eyecolor = "black";

alert(personObj.firstname + " 的年龄是    " + personObj.age + " 岁。" );

}

4、利用对象模板创建实例

function person(firstname, lastname, age, eyecolor){

this.firstname = firstname;

this.lastname = lastname;

this.age = age;

this.eyecolor = eyecolor;

}

function showPersonSample(){

myFather = new person("John", "Adams", 35, "black");

alert(myFather.firstname + " 的年龄是  " + myFather.age + "岁。");

}