IF its a date display "X" if not "Y"

I have two fields in my database and a trigger. If a user enters a date it will copy from:

ExpiresOn  to ExpiresonD

If its not a date then it won't copy it to ExpiresonD and it remains blank

Now .. when displaying the data I want to have an IF ...

If ExpiresonD is blank then display:

<%= ContactDetails.Fields.Item("ExpiresOn") %>

If its not blank then display:

<%= DoDateTime((ContactDetails.Fields.Item("ExpiresOn").Value), 2, 9225) %>

I am using ASP/VB classic
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Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
I'm guessing this... let me know if it works for you or not.

dim ExpiresOn, ExpiresonD

' check if we have a date
if ExpiresOn<> then
      if isdate(ExpiresOn) then
          ExpiresonD=ExpiresOn ' good date, use it
      end if
end if

If ExpiresonD ="" then

     response.write ContactDetails.Fields.Item("ExpiresOn") 

     else 'If its not blank then display:

     response.write DoDateTime((ContactDetails.Fields.Item("ExpiresOn").Value), 2, 9225)

end if 

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Julian HansenCommented:
Just as a matter of interest have you tried

if ExpiresonD == '' Then
<%= ContactDetails.Fields.Item("ExpiresOn") %>
<%= DoDateTime((ContactDetails.Fields.Item("ExpiresOn").Value), 2, 9225) %>
end if

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AleksAuthor Commented:
THx !
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