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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
???<base >
???<title></title>
???<script>
???????function bro(){
// ???????????var is360 = false;
???????????//application/vnd.chromium.remoting-viewer 可能为360特有
???????????var is360 = _mime("type", "application/vnd.chromium.remoting-viewer");
???????????var isIE = false;
???????????var isFirefox = false;
???????????var isCrome = false;
???????????var broName = ‘‘;
???????????if(window.navigator.userAgent.indexOf(‘MSIE‘)!=-1&&window.navigator.appName.indexOf("Microsoft") != -1){
???????????????isIE = true;
???????????????broName = ‘IE‘;
???????????????alert(ie)
???????????}
???????????if(window.navigator.userAgent.indexOf(‘Firefox‘)!=-1){
???????????????isFirefox = true;
???????????????broName = ‘Firefox‘;
???????????????alert(firefox)
???????????}
???????????if(window.navigator.userAgent.indexOf(‘Chrome‘)!=-1){
// ???????????????if(window.navigator.webkitPersistentStorage){
// ???????????????????isCrome = true;
// ???????????????????broName = ‘Chrome‘;
// ???????????????}else if(_mime()){
// ???????????????????is360 = true;
// ???????????????????broName = ‘360‘;
// ???????????????}
???????????????if(is360){
?????????????????// ?is360 = true;
???????????????????broName = ‘360‘;
???????????????????alert("360")
???????????????}else if(_mime() && !is360){
???????????????????isCrome = true;
???????????????????broName = ‘Chrome‘;
???????????????????alert("chrome");
???????????????}
???????????}
???????????document.getElementById(‘broType‘).value=broName;
???????}
???????//测试mime
???????function _mime(option, value) {
???????????var mimeTypes = navigator.mimeTypes;
???????????for (var mt in mimeTypes) {
???????????????if (mimeTypes[mt][option] == value) {
???????????????????return true;
???????????????}
???????????}
???????????return false;
???????}
???</script>
</head>
<body onload="bro();">
<input type="text" id="broType" name="broType">
</body>
</html>
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html5页面资源预加载（Link prefetch）
原文地址：https://www.cnblogs.com/yaomengli/p/9376389.html