識別呈現引擎、瀏覽器、平台、作業系統、移動系統

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var client = function() {
// 呈現引擎
var engine = {
ie: 0,
gecko: 0,
webkit: 0,
khtml: 0,
opera： 0,
// 完整版本
ver: null
}
//瀏覽器
var brower = {
ie: 0,
firefox: 0,
safari: 0,
konq: 0,
opera: 0,
chrome: 0,
// 具體版本
ver: null
}
// 平台、裝置、作業系統
var system = {
win: false,
max: false,
xll: false,
// 行動裝置
iphone: false,
ipod: false,
ipad: false,
ios: false,
android: false,
nokiaN:false,
winMobile: false,
//遊戲系統
wii: false,
ps: false
}

// 檢測呈現引擎與瀏覽器
var ua = navigator.userAgent
// 先檢查opera
if (window.opera) {
engine.ver = brower.ver = window.opera.version()
engine.opera = brower.opera = parseFloat(engine.ver)
} else if (/AppleWebkit\/(\S+)/.test(ua)) { // 檢測webkit
engine.ver = RegExp["$1"]
engine.webkit = parseFloat(engine.ver)
// 確認是chrome 還是safari
if (/Chrome\/(\S+)/.test(us)) {
brower.ver = RegExp["$1"]
brower.chrome =parseFloat(brower.ver)
} else if (/Version\/(\S+)/.test(ua)) {
brower.ver = RegExp["$1"]
brower.safari = parseFloat(brower.ver)
} else {
var safariVersion = 1
if (engine.webkit < 100) {
safariVersion = 1
} else if (engine.webkit < 312) {
safariVersion = 1.2
} else if (engine.webkit < 412) {
safariVersion = 1.3
} else {
safariVersion = 2
}
brower.safari = brower.ver = safariVersion
}
} else if (/KHTML\/(\S+)/.test(ua)||/Konqueror\/([^;]+)/.test(ua)) {// 檢測KHTML
engine.ver = brower.ver = RegExp["$1"]
engine.khtml = brower.konq = parseFloat(engine.ver)
} else if (/rv:([^\)])+)\)Gecko\/\d(8)/.test(ua)){
engine.ver = RegExp["$1"]
engine.gecko = parseFloat(engine.ver)
// 確實是否為firefox
if (/Firefox\/(\S+)/.test(ua)) {
brower.ver = RegExp["$1"]
brower.firefox = parseFloat(brower.ver)
}
} else if(/MSIE([^;]+)/.test(ua)) {// 檢測Ie
engine.ver = brower.ver = RegExp["$1"]
engine.ie = brower.ie = parseFloat(engine.ver)
}

//檢測瀏覽器
brower.ie = engine.ie
brower.opera = engine.opera

//檢測平台
var p = navigator.platform
system.win = p.indexOf("Win") == 0
system.mac = p.indexOf("Mac") == 0
system.xll = (p == "xll") || (p.indexOf("Linux") == 0)

// 檢測windows系統

if (system.win) {
if (/Win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)) {
if (RegExp["$1"] == "NT") {
switch (RegExp["$2"]) {
case "5.0":
system.win = "2000"
break
case "5.1":
system.win = "XP"
break
case "6.0":
system.win = "Vista"
break
case "6.1":
system.win = "7"
default:
system.win = "NT"
break
}
} else if (RegExp["$1"] == "9x") {
system.win = "ME"
} else {
system.win = RegExp["$1"]
}
}
}

// 行動裝置
system.iphone = ua.indexOf("iPhone") > -1
system.ipod = ua.indexOf("iPod") > -1
system.ipad = ua.indexOf("iPad") > -1
system.nokiaN = ua.indexOf("NokiaN") > -1

// window mobile
if (system.win == "CE") {
system.winMobile = system.win
} else if (system.win == "Ph") {
if (/Windows Phone OS (\d+.\d+)/.test(ua)) {
system.win = "Phone"
system.winMobile = parseFloat(RegExp["$1"])
}
}

// 檢測ios版本
if (system.mac && ua.indexOf("Mobile") > -1) {
if (/CPU (?:iPone )?OS (\d+_\d+)/.test(ua)){
system.ios = parseFloat(RegExp.$1.replace("_", "."))
} else {
system.ios = 2 //不能真正檢測出來，只能猜測
}
}

// 檢測Android版本
if (/Android (\d+\.\d+)/.test(ua)) {
system.android = parseFloat(RegExp.$1)
}

//遊戲系統
system.wii = ua.indexOf("Wii") > -1
system.ps = /playstation/i.test(ua)

// 返回對象
return {
engine: engine,
brower: brower,
system: system
}

}()

識別呈現引擎、瀏覽器、平台、作業系統、移動系統