Display The ServerTime In Four Different Time Zones With JScript?

I am adding a custom header to a SharePoint master page and I would like to display the current time in four different time zones. However, I don't want to use the client's time as there is no way to know what time zone the client will be in, or if they have the correct time on their computer.

Ideally, the time should be displayed as follows:

Dallas: (UTC-6 w/ DST support) Zulu: (UTC) Iraq: (UTC+3) Afghanistan: (UTC+4.5)

My problem is that I really don't know anything about ASP.NET, as I'm a PHP guy myself. So I need a way to pass the serverTime as a variable that JavaScript can use to perform calculations on to display the correct time zone.

UPDATE:

I need the clock to update as each second changes. So it is a live time instead of a static time.

UPDATE 2:

This is the code I'm using.

<script runat="server">
Sub Page_Load(ByVal Sender As Object, ByVal E As EventArgs)
End Sub
Public Function dtBase() As Double
Dim d1 As Date = New Date(1970, 1, 1)

[Code]....

UPDATE 3:

Still don't know if the code worked. My SharePoint server rejected the page for the code blocks. I have absolutely zero idea how to do code-behind. The JS works, but if the client's time is off, the site displays incorrect times. Really wish I could just code this in PHP. I'd be done a week ago. ;)

UPDATE 4:

This update is for anyone that stumbles across this in the future looking for the answer to the problem. The code above has been updated to work correctly. The only catch is that SharePoint disallows code by default, so to enable it, you have to modify the web.config file. The web.config file is usually in the root directory of the site. Inside that file (which is XML), you'll find a tag. Somehwere inside of that, you should find , and inside of that, you should find . Inside of that tag, you want to add this:

<PageParserPath VirtualPath="/relative/path/to/your/file/here.aspx" CompilationMode="Always" AllowServerSideScript="true" />