guoyao-jiankang/public/static/browser.js

(function(jQuery) {

    if (jQuery.browser) return;

    jQuery.browser = {};
    jQuery.browser.mozilla = false;
    jQuery.browser.webkit = false;
    jQuery.browser.opera = false;
    jQuery.browser.msie = false;

    var nAgt = navigator.userAgent;
    jQuery.browser.name = navigator.appName;
    jQuery.browser.fullVersion = '' + parseFloat(navigator.appVersion);
    jQuery.browser.majorVersion = parseInt(navigator.appVersion, 10);
    var nameOffset, verOffset, ix;

    // In Opera, the true version is after "Opera" or after "Version"   
    if ((verOffset = nAgt.indexOf("Opera")) != -1) {
        jQuery.browser.opera = true;
        jQuery.browser.name = "Opera";
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 6);
        if ((verOffset = nAgt.indexOf("Version")) != -1)
            jQuery.browser.fullVersion = nAgt.substring(verOffset + 8);
    }
    // In MSIE, the true version is after "MSIE" in userAgent   
    else if ((verOffset = nAgt.indexOf("MSIE")) != -1) {
        jQuery.browser.msie = true;
        jQuery.browser.name = "Microsoft Internet Explorer";
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 5);
    }
    // In Chrome, the true version is after "Chrome"   
    else if ((verOffset = nAgt.indexOf("Chrome")) != -1) {
        jQuery.browser.webkit = true;
        jQuery.browser.name = "Chrome";
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 7);
    }
    // In Safari, the true version is after "Safari" or after "Version"   
    else if ((verOffset = nAgt.indexOf("Safari")) != -1) {
        jQuery.browser.webkit = true;
        jQuery.browser.name = "Safari";
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 7);
        if ((verOffset = nAgt.indexOf("Version")) != -1)
            jQuery.browser.fullVersion = nAgt.substring(verOffset + 8);
    }
    // In Firefox, the true version is after "Firefox"   
    else if ((verOffset = nAgt.indexOf("Firefox")) != -1) {
        jQuery.browser.mozilla = true;
        jQuery.browser.name = "Firefox";
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 8);
    }
    // In most other browsers, "name/version" is at the end of userAgent   
    else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) <
        (verOffset = nAgt.lastIndexOf('/'))) {
        jQuery.browser.name = nAgt.substring(nameOffset, verOffset);
        jQuery.browser.fullVersion = nAgt.substring(verOffset + 1);
        if (jQuery.browser.name.toLowerCase() == jQuery.browser.name.toUpperCase()) {
            jQuery.browser.name = navigator.appName;
        }
    }
    // trim the fullVersion string at semicolon/space if present   
    if ((ix = jQuery.browser.fullVersion.indexOf(";")) != -1)
        jQuery.browser.fullVersion = jQuery.browser.fullVersion.substring(0, ix);
    if ((ix = jQuery.browser.fullVersion.indexOf(" ")) != -1)
        jQuery.browser.fullVersion = jQuery.browser.fullVersion.substring(0, ix);

    jQuery.browser.majorVersion = parseInt('' + jQuery.browser.fullVersion, 10);
    if (isNaN(jQuery.browser.majorVersion)) {
        jQuery.browser.fullVersion = '' + parseFloat(navigator.appVersion);
        jQuery.browser.majorVersion = parseInt(navigator.appVersion, 10);
    }
    jQuery.browser.version = jQuery.browser.majorVersion;
})(jQuery);