$(document).ready(function () {
	function iOSversion() {
		if (/iP(hone|od|ad)/.test(navigator.platform)) {
			var v = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/);
			return [parseInt(v[1], 10), parseInt(v[2], 10), parseInt(v[3] || 0, 10)];
		}
	}
	
	version = iOSversion();
	var ua = window.navigator.userAgent;
	var iOS = !!ua.match(/iPad/i) || !!ua.match(/iPhone/i);
	var webkit = !!ua.match(/WebKit/i);
	var iOSSafari = iOS && webkit && !ua.match(/CriOS/i);
	
	if ((version) && (iOSSafari) && (version[0] >= 12)) {
		var defaultImage = $('a').html();
		$('.cleanPreview').html(defaultImage);
		$('img.ar').addClass('active');
		setTimeout(function(){ 
			$('.cleanPreview').addClass('active');
		}, 100);
	} else {
		$('.viewerVersionNote').addClass('active');
		$('a').attr('href', '#').addClass('disabled');
	}
});