//"webkit":safari或chrome//"opera":Opera//"mozilla":Firefox或者其他gecko内核的浏览其//"msie":IE var browser=(function(){  var s=navigator.userAgent.toLowerCase();  var match=/(webkit)[\/]([\w.]+)/.exec(s)||      /(opera)(?:.*version)?[ \/]([\w.]+)/.exec(s)||      /(msie)([\w.]+)/.exec(s)||      !/compatible/.test(s)&&/(mozilla)(?:.*? rv:([\w.]+))?/.exec(s)||[];  return {name:match[1]||"",version:match[2]||"0"};}());//document.getElementById("test").innerHTML=JSON.stringify(browser);