how to send particular link in zope dtml methods

<tr><th><input type=checkbox></th>
<td>
<form id="myForm0<dtml-var sequence-number>" action="mainmes" method="post">
<input type="hidden" name="messid" value="<dtml-var id>">
<input type="hidden" name="eid" value="<dtml-var eid>">
<input type="hidden" name="pw" value="<dtml-var pw>">
<a href="#" target_blank="true" onclick="document.getElementById('myForm0<dtml-var sequence-number>').submit();">
<dtml-var from_id>
</a>
</form></td>
<td><dtml-var sub>