This is handled in javascript, since it is the javascript that opens the new window. As such you might find a better answer in the javascript forum.
[HTML]
<a class="CommentLink" href="_comment_view.asp?ID=<%=C_ID%>&AID=<%=NI D%>" onClick="window.open(this.href,'name','menubar=0, resizable=0, status=0, toolbar=0, location=0, directories=0, width=450, height=410, scrollbars=0');"><%=C_SUBJECT%></a>[/HTML]
Let me know if this helps
Jared