js method to determine browser version and browser kernel_javascript skills

if (!browser.ie && !browser.mac) {
var UA = navigator.userAgent.toLowerCase().toString();
//Determine whether it is a non-IE version under the IE kernel
if ((UA.indexOf('360ee') > -1) || (UA.indexOf('360se') > -1) || (UA.indexOf('se') > -1) || (UA.indexOf('aoyou') > -1)
|| (UA.indexOf('theworld') > -1) || (UA.indexOf('worldchrome') > -1) || (UA.indexOf('greenbrowser') > -1)
|| (UA.indexOf('baidu') > -1) || (UA.indexOf('qqbrowser') > -1)) {
//If yes, switch to compatibility mode
window.open("publicPage/point-se.aspx");
          }                                                                                                           else {                      //If not, it is recommended to change the browser
alert('It is recommended to switch to a browser with IE core');
          }                                                                                                    }  
else {
//Determine the version model of IE
If ( (browser.version == 10 && browser.ie10Compat) || (browser.version == 11 && browser.ie11Compat)) {
                  window.open("publicPage/point.aspx");
                                                                                                                            /*
* @desc Determine the browser version and browser kernel
* @author wangyanling
* @date July 4, 2014
*/
var browser = function () {
var agent = navigator.userAgent.toLowerCase(),
Opera = window.opera,
browser = {
//Detect whether the current browser is IE
          ie: /(msies|trident.*rv:)([w.] )/.test(agent),

//Detect whether the current browser is Opera
Opera: (!!opera && opera.version),
//Detect whether the current browser is a webkit-based browser

webkit: (agent.indexOf(' applewebkit/') > -1),

//Detect whether the current browser is running on the mac platform

mac: (agent.indexOf('macintosh') > -1),

//Detect whether the current browser is in "weird mode"

quirks: (document.compatMode == 'BackCompat')
};

//Detect whether the current browser kernel is gecko kernel
browser.gecko = (navigator.product == 'Gecko' && !browser.webkit && !browser.opera && !browser.ie);

var version = 0;

// Internet Explorer 6.0

If (browser.ie) {

        var v1 = agent.match(/(?:msies([w.] ))/);

        var v2 = agent.match(/(?:trident.*rv:([w.] ))/);

If (v1 && v2 && v1[1] && v2[1]) {
Version = Math.max(v1[1] * 1, v2[1] * 1);
            } else if (v1 && v1[1]) { 
Version = v1[1] * 1;
           } else if (v2 && v2[1]) {
Version = v2[1] * 1;
          } else {                                                 version = 0;
         } 

//Detect whether the browser mode is IE11 compatibility mode
browser.ie11Compat = document.documentMode == 11;

//Detect whether the browser mode is IE9 compatibility mode
browser.ie9Compat = document.documentMode == 9;

//Detect whether the browser mode is IE10 compatible mode
browser.ie10Compat = document.documentMode == 10;

//Detect whether the browser is IE8 browser
browser.ie8 = !!document.documentMode;

//Detect whether the browser mode is IE8 compatible mode
browser.ie8Compat = document.documentMode == 8;

//Detect whether the browser mode is IE7 compatibility mode
browser.ie7Compat = ((version == 7 && !document.documentMode) || document.documentMode == 7);

//Detect whether the browser mode is IE6 mode or weird mode
browser.ie6Compat = (version < 7 || browser.quirks);

browser.ie9above = version > 8;

browser.ie9below = version < 9;
}  

// Gecko.
If (browser.gecko) {
        var geckoRelease = agent.match(/rv:([d.] )/);  
If (geckoRelease) {
               geckoRelease = geckoRelease[1].split('.');
version = geckoRelease[0] * 10000 (geckoRelease[1] || 0) * 100 (geckoRelease[2] || 0) * 1;
                                                                                                              }  

//Detect whether the current browser is Chrome, if so, return Chrome's large version number

If (/chrome/(d .d)/i.test(agent)) {
        browser.chrome = RegExp['x241'];
}  

//Detect whether the current browser is Safari, if so, return the large version number of Safari

If (/(d .d)?(?:.d)?s safari/?(d .d )?/i.test(agent) && !/chrome/i.test(agent)) {
         browser.safari = (RegExp['x241'] || RegExp['x242']);
}  

// Opera 9.50

If (browser.opera)
Version = parseFloat(opera.version());

// WebKit 522 (Safari 3)

If (browser.webkit)
Version = parseFloat(agent.match(/ applewebkit/(d )/)[1]);

//Detect the current browser version number

browser.version = version;

return browser;

}();