Hvordan får jeg denne func. til at virke?

Hej
De skal udfulde felterne!!
<html>

<head>
<!-- Minus AutoDato -->
<title>Tilføj</title>
<META NAME=\"Generator\" CONTENT=\"Stone\'s WebWriter 3\">
<link rel=\"stylesheet\" href=\"../stilen.css\" type=\"text/css\">
<link rel=\"stylesheet\" href=\"../link.css\" type=\"text/css\">

<SCRIPT LANGUAGE=\"javascript\">       
            <!--                
            function checkfields(form) {
                if (\"form\".mail_email.value,\"form\".mail_kode.value == \"\"){               
                    alert(\"Udfyld alle felter\");
                    \"form\".mail_email.focus();               
                    return false;           
                }
            }
            -->
        </SCRIPT>

</head>

<BODY>
<FORM ACTION=\"<? echo \"$PHP_SELF\"; ?>\" NAME=\"f1\" onsubmit=\"return checkfields(f1)\" METHOD=\"POST\">
<TABLE BORDER=\"0\">
</TR>
<TR>
    <TD>Skriv din E-mail her:</TD>
    <TD><INPUT TYPE=\"text\" NAME=\"mail_email\"></TD>
</TR>
<TR>
    <TD>Skriv din kode her:</TD>
    <TD><INPUT TYPE=\"text\" NAME=\"mail_kode\"></TD>
</TR>
<TR VALIGN=\"top\">
    <TD COLSPAN=\"2\" ALIGN=\"justify\">
<INPUT TYPE=\"submit\" VALUE=\"Tilmeld\" NAME=\"f1\">
NAME=\"kodeord\">
</TD>
</TR>
</TABLE>
</FORM>
</FORM>

<P>&nbsp;</P>
<P>&nbsp;</P>
<FORM ACTION=\"mail.slet.php\" METHOD=\"POST\" NAME=\"f2\" onsubmit=\"return checkfields(f2)\"><TABLE BORDER=\"0\">
<TR>
    <TD COLSPAN=\"2\">Hvis du vi afmelde dig skriv din kode og e-mail her</TD>
</TR>
<TR>
    <TD>Skriv din E-mail her:</TD>
    <TD><INPUT TYPE=\"text\" NAME=\"mail_email\"></TD>
</TR>
<TR>
    <TD>Skriv din kode her:</TD>
    <TD><INPUT TYPE=\"text\" NAME=\"mail_kode\"></TD>
</TR>
<TR VALIGN=\"top\">
    <TD COLSPAN=\"2\" ALIGN=\"justify\">
<INPUT TYPE=\"submit\" VALUE=\"Afmeld\" NAME=\"f2\">
</TD>
</TR>
</TABLE>
</FORM>

</BODY>
</HTML>