一个检测浏览器名称，版本号的js

检测览器名称，版本号，操作系统

var BrowserDetect = {init: function () {this.browser = this.searchString(this.dataBrowser) || "An unknown browser";this.version = this.searchVersion(navigator.userAgent)|| this.searchVersion(navigator.appVersion)|| "an unknown version";this.OS = this.searchString(this.dataOS) || "an unknown OS";},searchString: function (data) {for (var i=0;i<data.length;i++){var dataString = data[i].string;var dataProp = data[i].prop;this.versionSearchString = data[i].versionSearch || data[i].identity;if (dataString) {if (dataString.indexOf(data[i].subString) != -1)return data[i].identity;}else if (dataProp)return data[i].identity;}},searchVersion: function (dataString) {var index = dataString.indexOf(this.versionSearchString);if (index == -1) return;return parseFloat(dataString.substring(index+this.versionSearchString.length+1));},dataBrowser: [{string: navigator.userAgent,subString: "Chrome",identity: "Chrome"},{ string: navigator.userAgent,subString: "OmniWeb",versionSearch: "OmniWeb/",identity: "OmniWeb"},{string: navigator.vendor,subString: "Apple",identity: "Safari",versionSearch: "Version"},{prop: window.opera,identity: "Opera",versionSearch: "Version"},{string: navigator.vendor,subString: "iCab",identity: "iCab"},{string: navigator.vendor,subString: "KDE",identity: "Konqueror"},{string: navigator.userAgent,subString: "Firefox",identity: "Firefox"},{string: navigator.vendor,subString: "Camino",identity: "Camino"},{// for newer Netscapes (6+)string: navigator.userAgent,subString: "Netscape",identity: "Netscape"},{string: navigator.userAgent,subString: "MSIE",identity: "Internet Explorer",versionSearch: "MSIE"},{string: navigator.userAgent,subString: "Gecko",identity: "Mozilla",versionSearch: "rv"},{ // for older Netscapes (4-)string: navigator.userAgent,subString: "Mozilla",identity: "Netscape",versionSearch: "Mozilla"}],dataOS : [{string: navigator.platform,subString: "Win",identity: "Windows"},{string: navigator.platform,subString: "Mac",identity: "Mac"},{   string: navigator.userAgent,   subString: "iPhone",   identity: "iPhone/iPod"    },{string: navigator.platform,subString: "Linux",identity: "Linux"}]};BrowserDetect.init();