// Checks for ie

    var isIE = !!navigator.userAgent.match(/MSIE/i) || !!navigator.userAgent.match(/Trident.*rv:11\./);

    isIE && $('html').addClass('ie');

  // Checks for iOs, Android, Blackberry, Opera Mini, and Windows mobile devices

var ua = window['navigator']['userAgent'] || window['navigator']['vendor'] || window['opera'];

(/iPhone|iPod|iPad|Silk|Android|BlackBerry|Opera Mini|IEMobile/).test(ua) && $('html').addClass('smart');

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