U.Helper

$.get('/publ/0-0-0-0-1', function(lol){  
             ssid = $('input[name="ssid"]', lol).val();  
             // Сюда и $.post  
});

<script language="javascript">
$.get('/publ/0-0-0-0-1', function(lol){   
             ssid = $('input[name="ssid"]', lol).val();   
});  
</script>
<input type="submit" style="display:none;" id="doSmbBt" />  <input class="manFlRst" id="puF10" type="reset" value="Очистить" onclick="" /></td></tr>
</table>
<input type="hidden" name="a" value="12" />
<input type="hidden" name="ssid" />

$.get('/mchat/', function(lol){   
                s_val = $('input[name="s"]', lol).val();   
                alert(s_val);
});