Recherche d'une ligne d'un tableau

Bonjour
je suis debutante en php ej j'ai crée une page web dont il ya un bouton et un champs de recherche si on le clique, la ligne recherché devra affiché et les zones textes seront remplis automatiquement mais j'ai pas reussi
J'espere que quelqu'un peut m'aider et merci d'avance
Ci-joint le code que j'ai fait mais j'ai pas connu l'erreur
///code

<p align="center"> <table width="1290" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#CCE6FF" >
<tr rowspan="4" bgcolor="#CCE6E6">
<td height="53" colspan="4" > <div align="center" class="Style1">
<div align="center" class="Style3">Facture Avoir</div></td>
</tr>
<tr bgcolor="#CCE6E6" rowspan="3" ><td colspan="4" nowrap="nowrap" bgcolor="#CCE6FF"><div align="center"></div></td>
</tr>
<tr bgcolor="#CCE6E6" align="center">
<td width="62" bgcolor="#CCE6FF"><div align="center"><span class="Style5"><span class="Style5"><span class="Style7"></span></span></span></div></td>
<td width="87" nowrap="nowrap" bordercolor="#BFE2E8" bgcolor="#CCE6FF"><div align="left" class="Style8"><span class="Style6">Client:</span> </div></td>
<td width="184" bordercolor="#BFE2E8" bgcolor="#CCE6FF">
<div align="left" class="Style8">
<input name="nom_client_rech" type="text" id="nom_client_rech" size="16" maxlength="16" />
</div></td><td width="867" bgcolor="#CCE6FF"><div align="center"><span class="Style5"><span class="Style5"><span class="Style7"></span></span></span></div></td>
</tr>
<tr bgcolor="#CCE6E6" align="center">
<td bgcolor="#CCE6FF"><div align="center"><span class="Style5"><span class="Style5"><span class="Style7"></span></span></span></div></td>
<td bgcolor="#CCE6FF"><div align="center"><span class="Style5"><span class="Style5"><span class="Style7"></span></span></span></div></td>
<td bgcolor="#CCE6FF"><label>

<div align="left" class="Style8">
<input type="submit" name="Submit" value="Rechercher" />
</div>
<span class="Style8">
</label>
</span></td>
<td bgcolor="#CCE6FF"><div align="center"><span class="Style5"><span class="Style5"><span class="Style7"></span></span></span></div></td>
</tr>
</table>
<table align="center">
<tr>
<td nowrap="nowrap"><span class="Style11">N° Facture:</span></td>
<td colspan="5"><input name="num_facture" type="text" id="num_facture" value="<?php echo $row->num_facture; ?>" size="50"/></td>
</tr>
<tr>
<td nowrap="nowrap"><span class="Style11">N° Facture Avoir:</span></td>
<td colspan="5"><input name="num_facture_avoir" type="text" id="num_facture_avoir" value="<?php echo $row->num_facture_avoir; ?>" size="50"/></td>
</tr>
<tr>
<td nowrap="nowrap"><span class="Style11">T.V.A:</span></td>
<td colspan="5"><input name="tva" type="text" id="tva" value="<?php echo $row->tva; ?>" size="50"/></td>
</tr>

<tr>
<td nowrap="nowrap"><span class="Style11">Tot.TTC:</span></td>
<td colspan="5"><input name="tot_ttc_avoir" disabled="disabled" type="text" id="tot_ttc_avoir" value="0.000" size="50"/></td>
</tr>
<tr>
<td nowrap="nowrap"><span class="Style11">TTC:</span></td>
<td colspan="5"><input name="ttc_avoir" disabled="disabled" type="text" id="ttc_avoir" value="0.000" size="50"/></td>
</tr>
<tr>
<td nowrap="nowrap"><span class="Style11">Timbre:</span>
<input name="timbre" type="radio" checked="checked" value="0.000" /></td>
<td><input name="timbre" type="text" disabled="disabled" id="timbre" value="0.000" size="50"/></td>
</tr>
</table>
<p> </p>
<table align="center">
<tr bgcolor="#CCE6E6">
<td ><span class="Style7">COCH</span></td>
<td ><span class="Style7">N°</span></td>
<td><span class="Style7">N° Facture Avoir</span></td>
<td nowrap="nowrap"><span class="Style7">Client</span></td>
<td><span class="Style7">société</span></td>
<td nowrap="nowrap" bgcolor="#CCE6E6"> cmb TVA</td>
<td nowrap="nowrap" bgcolor="#CCE6E6"> Montant</td>
<td nowrap="nowrap" bgcolor="#CCE6E6"> Date d'Ajout </td>
<td nowrap="nowrap" bgcolor="#CCE6E6"> Date Modif</td>
</tr>
<p> </p>

<?php include("connexion.php");

$i=0;
import_request_variables(gp);
$req=mysql_query("select * from facture_avoir where nom_client like'".$nom_client_rech."%' ORDER BY 'nom_client' DESC ")or die (mysql_error());

while($row=mysql_fetch_object($req))
{ $i++;
if(($i % 2)==1)
{$col='#CCE6FF';
} else $col='#CCE6E6';
?>
<tr bgcolor=<?php echo $col; ?>>
<td><span class="Style14 Style7"> </span></td>
<td><span class="Style14 Style7"><?php echo $i;?></span></td>
<td><span class="Style14 Style7"><?php echo $row->num_facture_avoir; ?></span></td>
<td><span class="Style14 Style7"><?php echo $row->nom_client; ?></span></td>
<td><span class="Style14 Style7"><?php echo $row->nom_societe; ?></span></td>
<td><span class="Style14 Style7"><?php echo $row->cmb_tva; ?></span></td>
<td><span class="Style14 Style7"><?php echo $row->montant; ?></span></td>
<td nowrap="nowrap" bgcolor="<?php echo $col; ?>"><span class="Style14"><?php echo $row->date_ajout; ?></span></td>
<td nowrap="nowrap" bgcolor="<?php echo $col; ?>"><span class="Style14"><?php echo $row->date_modif; ?></span></td>

</tr>
<?php }?>
 
</table>

<table align="center">
<tr><td>
<p align="center">
<input type="submit" name="Submit2" value="Quitter" />
<input type="submit" name="Submit22" value="Imprimer" />
<input type="submit" name="Submit23" value="OK" />
</p>
</td></tr></table> 

</html>