ASP to write Javascript

I have two database tables that are linked on a 12 digit alphanumeric field (I know that's bad, but I didn't design it and it has to be this way b/c that's how we get the data). Normally, I would just put a drop down for users to select which code that one to associate it, but in this case the lookup table consists of 12,000+ rows. What I am trying to do on the form is to expand my form validation as much as I can so that if the rules for code don't match then the form doesn't get submitted. Let me break down the value of the field:

digits 1 & 2 are numeric.
digit 3 is either 0 or N
digit 4 is a value from another lookup table
digit 5 & 6 are 0s (for now)

The problem I am having is that I want my regular expression to include knowledge of the fourth digit. Currently the values can be C, E, S or T and the administrators of the site have the ability to change those values. So ideally, I want to hit the database to see what values are valid for that field. I know that I could use asp to write out all of the JavaScript to the form and then for that part of the regular expression I could hit the database, but I was hoping for a simpler solution since this is the only part of the form that needs database validation before submitting the form.

This is what I have currently for my validation:

<script language="javascript">
<!--
function validate(theform){

var reCoverageCd1 = /^\d{2}[0N]{1}\w{1}[0]{2}/;
if (theform.coverage_cd1.value == ""){
alert("You forgot to fill in the Coverage Code Box1");
return (false);
}
else if (!reCoverageCd1.test(theform.coverage_cd1.value)) {
alert("You have entered an invalid coverage code in box 1.");
return (false);
}
}
//-->
</script>

What about something like this?

<%
'get the unique alphavalues
Set oRS = oConn.Execute "SELECT DISTINCT fieldName FROM tableName WHERE thisField = 'someCondition';"
If Not oRS.EOF Then
Dim x : x = ""
Do Until oRS.EOF
x = x & oRS("fieldName") & "|"
oRS.MoveNext
Loop
End If
oRS.Close
Set oRS = Nothing
dim z : z = Len(x)
x = Left(x, z-1) 'remove the trailing |
%>
<script language="javascript">
<!--
function validate(theform){

var reCoverageCd1 = /^\d{2}[0N]{1}\[<%=x%>]{1}[0]{2}/;
if (theform.coverage_cd1.value == ""){
alert("You forgot to fill in the Coverage Code Box1");
return (false);
}
else if (!reCoverageCd1.test(theform.coverage_cd1.value)) {
alert("You have entered an invalid coverage code in box 1.");
return (false);
}
}
//-->
</script>

Because you can't mix ASP inside of a Javascript tag.

Yes you can. I do it all over the place.

Well, I always thought you couldn't do that. So I'll give it try and let you know how it works.

Yeah you can because by the time the Javascript runs the ASP code has already been executed and done away with.

Because you can't mix ASP inside of a Javascript tag.

I mix server side code(asp and php) inside of client side Javascript all the time.