jquery判断浏览器

$.browser.['浏览器关键字']

$(function() {

if($.browser.msie) {

   alert("this is msie");

}else if($.browser.safari){

   alert("this is safari");

}else if($.browser.mozilla){

  alert("this is mozilla");

}else if($.browser.opera){

  alert("this is opera");

}else if($.browser.webkit){

   alert("this is safari,chrome")

}else{

   alert("i don't know!")

}

我们看下jQuery的源码:

var userAgent = navigator.userAgent.toLowerCase();

// Figure out what browser is being used

jQuery.browser = {

version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],

safari: /webkit/.test( userAgent ),

opera: /opera/.test( userAgent ),

msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),

mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )

};