[jQuery] How to display data from a db into a dialog window (jquery UI)

[Femtox]

Hi,

I use dialog window as a form to insert new record into a db, now I'm
trying to use this method also to update records. But I don't find a
solution. I use PHP. For example, how can i pass the right parameter
for the query? Below a little code as example:

<div id="dialogEdit" title="Crea nuova lavorazione">
        <form id="formLavorazione" name="lavorazione">
           <input type="hidden" name="action" value="update"/>
                   <?php
           $lavorazione_info = "SELECT * FROM lavorazioni WHERE
idLavorazione=".$_POST['id'];
           $lavorazione = mysql_fetch_array(mysql_query($lavorazione_info));
           ?>
                <fieldset>
                <label for="marca">Descrizione</label>
                <input type="text" name="descrizioneLavorazione"
id="descrizioneLavorazione" class="text ui-widget-content ui-corner-
all" value="<?php echo $lavorazione['descrizioneLavorazione']?>"/>
                <label for="modello">Costo</label>
                <input type="text" name="costo" id="costo" value=""
class="text ui-widget-content ui-corner-all" value="<?php echo
$lavorazione['costo']?>"/>
               </fieldset>
        </form>
</div>

And then, i try to change the value field inside the input tag, but i
don't display it? Why? Some idea or good link?

Thank you very much

fem