function domain() {
var url = document.location.href;
url = url.replace(/^(http:\/\/|https:\/\/)*([a-zA-Z0-9-_\.=]+):*.*/, "$2");
var res;

if (url == 'mail.km.yn.cninfo.net') {
	return url;
}
res = url.match(/^(email|mail|webmail|www|freemail|)\.(.*)/);
if (res) { url = res[2] }
return url;
}