function isBroswer () {//检测浏览器内核--返回的是两个key,name:浏览器内核的名称---version:浏览器的版本号
var _broswer = {};
var sUserAgent = navigator.userAgent;
var isOpera = sUserAgent.indexOf("Opera") > -1;
if (isOpera) {
//首先检测Opera是否进行了伪装
if (navigator.appName == 'Opera') {
//如果没有进行伪装,则直接后去版本号
_broswer.version = parseFloat(navigator.appVersion);
} else {
var reOperaVersion = new RegExp("Opera (\\d+.\\d+)");
//使用正则表达式的test方法测试并将版本号保存在RegExp.$1中
reOperaVersion.test(sUserAgent);
_broswer.version = parseFloat(RegExp['$1']);
}
_broswer.opera = true;
_broswer.name = 'opera';
}
var isChrome = sUserAgent.indexOf("Chrome") > -1;
if (isChrome) {
var reChorme = new RegExp("Chrome/(\\d+\\.\\d+(?:\\.\\d+\\.\\d+))?");
reChorme.test(sUserAgent);
_broswer.version = parseFloat(RegExp['$1']);
_broswer.chrome = true;
_broswer.name = 'chrome';
}
//排除Chrome信息,因为在Chrome的user-agent字符串中会出现Konqueror/Safari的关键字
var isKHTML = (sUserAgent.indexOf("KHTML") > -1
|| sUserAgent.indexOf("Konqueror") > -1 || sUserAgent
.indexOf("AppleWebKit") > -1)
&& !isChrome;
if (isKHTML) {//判断是否基于KHTML,如果时的话在继续判断属于何种KHTML浏览器
var isSafari = sUserAgent.indexOf("AppleWebKit") > -1;
var isKonq = sUserAgent.indexOf("Konqueror") > -1;
if (isSafari) {
var reAppleWebKit = new RegExp("Version/(\\d+(?:\\.\\d*)?)");
reAppleWebKit.test(sUserAgent);
var fAppleWebKitVersion = parseFloat(RegExp["$1"]);
_broswer.version = parseFloat(RegExp['$1']);
_broswer.safari = true;
_broswer.name = 'safari';
} else if (isKonq) {
var reKong = new RegExp(
"Konqueror/(\\d+(?:\\.\\d+(?\\.\\d)?)?)");
reKong.test(sUserAgent);
_broswer.version = parseFloat(RegExp['$1']);
_broswer.konqueror = true;
_broswer.name = 'konqueror';
}
}
// !isOpera 避免是由Opera伪装成的IE
var isIE = sUserAgent.indexOf("compatible") > -1
&& sUserAgent.indexOf("MSIE") > -1 && !isOpera;
if (isIE) {
var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
reIE.test(sUserAgent);
_broswer.version = parseFloat(RegExp['$1']);
_broswer.msie = true;
_broswer.name = 'msie';
}
// 排除Chrome 及 Konqueror/Safari 的伪装
var isMoz = sUserAgent.indexOf("Gecko") > -1 && !isChrome && !isKHTML;
if (isMoz) {
var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
reMoz.test(sUserAgent);
_broswer.version = parseFloat(RegExp['$1']);
_broswer.mozilla = true;
_broswer.name = 'mozilla';
}
return _broswer;
}
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