ClientBrowserCheck.js

// 客户端浏览器检测工具类

var ClientBrowserCheck = function(){

	// 呈现引擎
	var engine = {
		ie: 0,
		gecko: 0,
		webkit: 0,
		khtml: 0,
		opera: 0,

		// 完成的版本号
		ver: null
	};

	// 浏览器
	var browser = {
		ie: 0,
		firefox: 0,
		safari: 0,
		konq: 0,
		opera: 0,
		chrome: 0,

		// 具体的版本号
		ver: null
	};

	// 平台,设备和操作系统
	var system = {
		win: false,
		mac: false,
		x11: false,

		// 移动设备
		iphone: false,
		ipod: false,
		ipad: false,
		ios: false,
		abdroid: false,
		nokiaN: false,
		winMobile: false,

		// 游戏系统
		wii: false,
		ps: false
	};

	// 检测呈现引擎和浏览器
	var ua = navigator.userAgent;
	if(window.opera){
		engine.ver = browser.ver = window.opera.version();
		engine.opera = browser.opera = parseFloat(engine.ver);
	}else if(/AppleWebKit\/(\S+)/.test(ua)){
		engine.ver = RegExp["$1"];
		engine.webkit = parseFloat(engine.ver);

		// 确定是Chrome还是Safari
		if(/Chrome\/(\S+)/.test(ua)){
			browser.ver = RegExp["$1"];
			browser.chrome = parseFloat(browser.ver);
		}else if(/Version\/(\S+)/.test(ua)){
			browser.ver = RegExp["$1"];
			browser.safari = parseFloat(browser.ver);
		}else{
			// 近似地确定版本号
			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;
			}

			browser.safari = browser.ver = safariVersion;
		}
	}else if(/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){
		engine.ver = browser.ver = RegExp["$1"];
		engine.KHTML = browser.konq = parseFloat(engine.ver);
	}else if(/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
		engine.ver = RegExp["$1"];
		engine.gecko = parseFloat(engine.ver);

		// 确定是不是Firefox
		if(/Firefox\/(\S+)/.test(ua)){
			browser.ver = RegExp["$1"];
			browser.firefox = parseFloat(browser.ver);
		}
	}else if(/MSIE ([^;]+)/.test(ua)){
		engine.ver = browser.ver = RegExp["$1"];
		engine.ie = browser.ie = parseFloat(engine.ver);
	}

	// 检测平台
	var p = navigator.platform;
	system.win = p.indexOf("Win") == 0;
	system.mac = p.indexOf("Mac") == 0;
	system.x11 = (p == "X11") || (p.indexOf("Linux") ==0);

	// 检测Windows操作系统
	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";
						break;
					default:
						system.win = "NT";
						break;
				}
			}else if(RegExp["$1"] == "9x"){
				system.win = "ME";
			}else{
				system.win = RegExp["$1"];
			}
		}
	}

	// 移动设备
	system.iphone = ua.indexOf("iPhone") > -1;
	system.ipod = ua.indexOf("iPod") > -1;
	system.ipad = ua.indexOf("iPad") > -1;
	system.nokiaN = ua.indexOf("NokiaN") > -1;

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

	// 检测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{
			// 不能直接检测出来,所以只能猜测
			system.ios = 2;
		}
	}

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

	// 游戏系统
	system.wii = ua.indexOf("Wii") > -1;
	system.ps = /playstation/i.test("ua");

	// 返回这些对象
	return {
		engine: engine,
		browser: browser,
		system: system
	};
}();