<script>
if(location.href.indexOf(‘//y.qq.com‘)!=-1){
document.write("<script>document.domain = ‘qq.com‘;<\/script>");
}else {
document.write("<script>document.domain = ‘qqmusic.com‘;<\/script>");
}
</script>
原文：https://www.cnblogs.com/ysbl/p/11922987.html