JavaScript判断浏览器类型

 

        function ceshi() {
     
            var browserName = navigator.userAgent.toLowerCase();
            if (/msie/i.test(browserName) && !/opera/.test(browserName)) {
                alert("IE");
                return;
            } else if (/firefox/i.test(browserName)) {
                alert("Firefox");
                return;
            } else if (/chrome/i.test(browserName) && /webkit/i.test(browserName) && /mozilla/i.test(browserName)) {
                alert("Chrome");
                return;
            } else if (/opera/i.test(browserName)) {
                alert("Opera");
                return;
            } else if (/webkit/i.test(browserName) && !(/chrome/i.test(browserName) && /webkit/i.test(browserName) && /mozilla/i.test(browserName))) {
                alert("Safari");
                return;
            } else {
                alert("unKnow");
            }

        }