Retrieve parent document value from iFrame

Working on a solution for a Sitecore CMS page that includes passing a variable from the parent page to an VBScript ASP page in an iFrame.  The code I currently have in the parent page is:

<script>
    var locationID = '@Model.IgnitionID';
    document.write(locationID);
</script>

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And the code in the receiving iFrame page is:

<%
Dim barkBark
barkBark = ("#locationID", top.document)
%>

...later in the code...
<p>Location ID: </p>
<%response.Write(barkBark) %>

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I know the parent page code works - the document.write shows the correct code.

When I run the code as-is, I get an 'expected ')' message, with the prompt to put it after "#locationID".  I have tried adding it there, nesting it another set of parens, changing top.document to parent.document.body.  The anticipated value is a GUID.

Any help is greatly appreciated!