JS根据不通的域名显示不同的备案号和内容，代码如下：
<p>
<a href="https://beian.miit.gov.cn/" target="_blank" id="ICP" rel="nofollow" >冀ICP备****号</a>
</p>
<script>
var yuming = window.location.host;
if (yuming == "www.a*.com" || yuming == "a*.com") {
document.getElementById("ICP").innerHTML = "冀ICP备****号";
}
else if (yuming == "b*.com") {
document.getElementById("ICP").innerHTML = "豫ICP备****号";
}
</script>