判断是否在微信浏览器

//判断是否在微信打开网页

function is_weixn(){
var ua = navigator.userAgent.toLowerCase();
if(ua.match(/MicroMessenger/i)=="micromessenger") {
return true;
} else {
return false;
}
}
var browser={

        versions:function(){
            var u = navigator.userAgent, app = navigator.appVersion;

            return {
                trident: u.indexOf('Trident') > -1, //IE
                presto: u.indexOf('Presto') > -1, //opera
                webKit: u.indexOf('AppleWebKit') > -1, //??
                gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //
                mobile: !!u.match(/AppleWebKit.*Mobile.*/)||!!u.match(/AppleWebKit/), //?
                ios: !!u.match(/(i[^;]+\;(U;)? CPU.+Mac OS X)/), //ios
                android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //androiduc                iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //honeQHD                iPad: u.indexOf('iPad') > -1, //Pad
                webApp: u.indexOf('Safari') == -1 //eb????
                };
            }(),
            language:(navigator.browserLanguage || navigator.language).toLowerCase()
            }

        

      
if(browser.versions.ios)
{


         
}
else if(browser.versions.android)
{
 

}
else
{
//document.writeln("<h1>不支持该设备！</h1>");
}