强制关闭网页

/*强制关闭网页*/
function closeWebPage() {
    document.querySelector("html").style.display = "none";
    let ua = navigator.userAgent, w = top;
    if (ua.indexOf("MSIE") > 0) {
        if (ua.indexOf("MSIE 6.0") > 0) {
            w.opener = null;
            w.close();
        } else {
            w.open("", "_top");
            w.close();
        }
    } else if (ua.indexOf("Firefox") > 0) {
        w.location.replace("about:blank");
    } else {
        w.opener = null;
        w.open("", "_self", "");
        w.close();
    }
}