ASPX/.NET - "User.Identity.Name" any known issues?

I am building an intranet website. It should be JavaScript-html.
However, I have to check who is current windows domain-user logged in. So for my homepage, I have written aspx-page - myfirstpage.aspx (Because in JavaScript there is no way to find out currently logged-in user )  
So I am planning to get userid by using this code -

String username = User.Identity.Name; /// in myfirstpage.aspx.cs

Are there any problems/issues like browser issues in getting username like this in aspx?

Or is there any other way to get username using JavaScript...

thanks a lot...
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Easwaran ParamasivamCommented:
No. There should not be any problem by getting the user details in terms of browser or any other aspect. You can go ahead and use. In Javascript there no such built in way to identify the logged in user.

Optionally you could use:

stirng user = HttpContext.Current.User.Identity.Name;

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ts84zsAuthor Commented:
ok thanks so much... What is the best way to do this type of check ...
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