var wsdfyy_icp = {"0355fk.com":{"icp":"晋ICP备14005008号-1","gaba":"14040202000037"},"czsafk.com":{"icp":"晋ICP备14005008号-8","gaba":"14040202000038"},"czsafc.com":{"icp":"晋ICP备14005008号-6","gaba":"14040202000033"},"czsayy.com":{"icp":"晋ICP备14005008号-7","gaba":"14040202000032"}}
 
function getMainHost() {
    let key = `mh_${Math.random()}`;
    let keyR = new RegExp(`(^|;)\\s*${key}=12345`);
    let expiredTime = new Date(0);
    let domain = document.domain;
    let domainList = domain.split('.');

    let urlItems = [];
    urlItems.unshift(domainList.pop());
    while (domainList.length) {
        urlItems.unshift(domainList.pop());
        let mainHost = urlItems.join('.');
        let cookie = `${key}=${12345};domain=.${mainHost}`;

        document.cookie = cookie;

        //如果cookie存在，则说明域名合法
        if (keyR.test(document.cookie)) {
            document.cookie = `${cookie};expires=${expiredTime}`;
            return mainHost;
        }
    }
}
console.log(getMainHost())
 
    
    console.log(wsdfyy_icp[getMainHost()].gaba)
    document.write('<a target="_blank" rel="nofollow" style="color:#7d7b7b" href="//www.beian.gov.cn/portal/registerSystemInfo?recordcode='+wsdfyy_icp[getMainHost()].gaba+'"><img src="//swt.0355fk.com/beian/beian.png" style="vertical-align:middle" />晋公网安备 '+wsdfyy_icp[getMainHost()].gaba+'号</a>');