Form results to variable email

<Is it possible to set the destination of form results based upon the content of a formfield (i.e. drop down box?)>

Hi, question about that I want .
I did the drop-down menu and "Send" / "Reset" buttons, but I can't get the results :(

When I press "Send" I get some kind of error - Cannot run the FrontPage Server Extensions' Smart HTML interpreter on this non-HTML page: "***"

I have something like this (copy-paste with some changes from http://www.timeforweb.com/frontpage/forum_posts.asp?TID=518&PN=5):

<FORM NAME="mailer" METHOD="post" ACTION="" ENCTYPE="text/plain"
onSubmit="(document.mailer.action += mailtoandsubject)">

<!-- Original: Jeff Kieke -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<TABLE BORDER=0>
<TR VALIGN="top">
<TD>Recipient:</TD>
<TD><SELECT NAME="mailtoperson" onChange="msg(this.form)">
<OPTION VALUE="">-- Vali --
<OPTION VALUE="liina.jogisu@mail.ee">Liina mail.ee
<OPTION VALUE="liina_j@yahoo.com">Liina yahoo.com
</SELECT></TD>
</TR>
<TR>
<TD> </TD>
<TD><INPUT TYPE="submit" VALUE="Send" style="font-family: verdana; font-size: 10pt" name="Send">
<INPUT TYPE="reset" VALUE="Reset" name="Reset"></TD>
</TR>
</TABLE>
</FORM>

<SCRIPT LANGUAGE="JavaScript">
function msg() {
document.mailer.action = "mailto:"
mailtoandsubject = ((document.mailer.mailtoperson.options[document.mailer.mailtoperson.selectedIndex].value) + '?subject=' + document.mailer.subject.value);
}

</SCRIPT>