javascript 浏览器检测 -- 涵盖主流浏览器

/**
 * @author wsf
 * 检测浏览器版本
 */

var browser

 = {
    "explorer": {
        "ie": /msie ([\d.]+).*\.net clr (\d\.){1,2}\d+\)$/,
        "firefox": /firefox\/([\d.]+)/,
        "chrome": /chrome\/([\d.]+)/,
        "opera": /opera.([\d.]+)/,
        "safari": /version\/([\d.]+).*safari/,
		"se" : /msie ([\d.]+).*\.net clr (\d\.){1,2}\d+; 360se\)$/,//360浏览器
		"sougou" : /msie ([\d.]+).*\.net clr (\d\.){1,2}\d+; .*metasr.*\d\)$/,//搜狗浏览器
		"maxthon" : /maxthon\/([\d.]+)///遨游浏览器webkit
    }
};

        /**
         * 判断浏览器代码
         */
var userAgent = navigator.userAgent.toLowerCase();
var expName = null;
(expName = userAgent.match(browser.explorer.ie)) ? browser.ie = expName[1] :
(expName = userAgent.match(browser.explorer.firefox)) ? browser.firefox = expName[1] :
(expName = userAgent.match(browser.explorer.chrome)) ? browser.chrome = expName[1] : 
(expName = userAgent.match(browser.explorer.opera)) ? browser.opera = expName[1] : 
(expName = userAgent.match(browser.explorer.safari)) ? browser.safari = expName[1] : 
(expName = userAgent.match(browser.explorer.se)) ? browser.se = expName[1] :
(expName = userAgent.match(browser.explorer.sougou)) ? browser.sougou = expName[1] : 
(expName = userAgent.match(browser.explorer.maxthon)) ? browser.maxthon = expName[1] :
false; 

***************************调用********************
if(browser.ie === 6){
      //ie6
}else if (browser.ie === 7){
     //ie7
}else if(browser.ie === 8){
    ///ie8
}else if(browser.ie === 9){
   //ie9
}等