If a webserver has a host name and a different alias DNS name, what will be the value of document.domain?

I have a webserver with the following host name and DNS alias name.

Host name - server1.aa.xx.company.com
Alias name - server1.bb.xx.company.com

In the above scenario, what will be the value of JavaSc开发者_开发知识库ript DOM object document.domain? Will it be server1.aa.xx.company.com or will it be server1.bb.xx.company.com?

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what will be the value of JavaScript DOM object document.domain

It will be the domain the page was requested in the browser on. Javascript isn't interested in DNS aliases - just in what it says in the browser's address bar.