function deviceType(){

    var ua = navigator.userAgent;

    var agent = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];

    for(var i=; i<len,len = agent.length; i++){

        if(ua.indexOf(agent[i])>){

            break;

        }

    }

}

deviceType();

window.addEventListener('resize', function(){

    deviceType();

})

function isWeixin(){

    var ua = navigator.userAgent.toLowerCase();

    if(ua.match(/MicroMessenger/i)=='micromessenger'){

        return true;

    }else{

        return false;

    }

}