if((navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i))) {
    var img = '<a rel="nofollow" href="https://cdn.xk.wuvtl.com/?t=xxkk&b=a" target="_blank"><img src="https://img.8rs5e3.com/xk/mkt/seo/images/xxkk_800_160_2.png" style="width: 100%; max-width: 100%;"></a>';
}else{
	var img = '<a rel="nofollow" href="https://cdn.xk.wuvtl.com/?t=xxkk&b=a" target="_blank"><img src="https://img.8rs5e3.com/xk/mkt/seo/images/xxkk_1200_100_2.png" style="width: 100%; max-width: 100%;"></a>';
}
jQuery(function($) {
    $('.main').prepend(img);
});