navigator.iam = (function(){
    var ua= navigator.userAgent;
    var tem;
    var M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
    if(/trident/i.test(M[1])){
        tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];
        return 'IE '+(tem[1] || '');
    }
    if(M[1]=== 'Chrome'){
        tem= ua.match(/\b(OPR|Edge)\/(\d+)/);
        if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
    }
    M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
    if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);
    return M.join(' ');
})();

async function asyncLoadImage(link, container = false) {
    let pixel = document.createElement("div");
    let css = 'width:1px;height:1px;position:absolute;left:-99999px;';
    pixel.style.cssText = 'background-image: url("' + link + '");' + css;
    
    let box = container ? document.querySelector(container) : document.body;
    box.appendChild(p