Problem with disable

Hey!
I have a project in asp.net (3.5) -and i have a problem.

I have 6 <asp:HyperLink> in table.
every link move the user to different aspx page.
i need to disable the link that the user click on it - while he is in the page.
for example:
<asp:HyperLink ID="HpAboutUs" runat="server" NavigateUrl="~/Pages/AboutUs.aspx" Text="About Us"></asp:HyperLink>
if the user click on "HpAboutUs" link - it move to "AboutUs.aspx" - and then the "HpAboutUs" link is diable (all the other links are enable).
after he press on onother link - "HpAboutUs" link return to be enable.
someone know how to do it?

thanks.
Adi.

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