Javascript检测客户端分辨率,操作系统,浏览器,屏幕色彩信息

(function () {
    var resolution = "分辨率:" + window.screen.width + "*" + window.screen.height;
    alert(resolution);
})();

(function () {
    var ua = window.navigator.userAgent;
    var osVersion = ua.split(";")[2];
    var osV = osVersion.substr(osVersion.length - 3, 3);
    var opName = "";
    switch (osV) {
        case "5.0":
            opName = "Win2000";
            break;
        case "5.1":
            opName = "WinXP";
            break;
        case "5.2":
            opName = "Win2003";
            break;
        case "6.1":
            opName = "Win 7";
            break;
        default:
            opName = "Other";
            break;
    }
    alert("操作系统:" + opName);
})();

(function () {
    var Sys = {};
    var ua = navigator.userAgent.toLowerCase();
    var s;
    (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
            (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
            (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
            (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
            (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;
    if (Sys.ie)
        result = { Type: "ie", Ver: Sys.ie };
    else if (Sys.firefox)
        result = { Type: "firefox", Ver: Sys.firefox };
    else if (Sys.chrome)
        result = { Type: "chrome", Ver: Sys.chrome };
    else if (Sys.opera)
        result = { Type: "opera", Ver: Sys.opera };
    else if (Sys.safari)
        result = { Type: "safari", Ver: Sys.safari };
    else
        result = { Type: "unknown", Ver: "unknown" };
    //var result = {"Type":navigator.appName,"Ver":navigator.appVersion};

    alert("浏览器:" + result.Type + ",版本:" + result.Ver);
})();

(function () {
    var c;
    var cv = 16;
    if (cv != "Netscape")
        c = screen.colorDepth;
    else
        c = screen.pixelDepth;
    var cs = c;
    if (c == 4)
        cs = "4 位 16 色";
    if (c == 8)
        cs = "8 位 256 色";
    if (c == 16)
        cs = "16 位增强色";
    if (c > 16)
        cs = cs + " 位真彩色";
    alert(cs);
})();